Consequences for infants of parental disagreement in pregnancy intention. (Articles).What are the consequences for infants' health and development of disagreement in fertility fertility: see infertility.
Ability of an individual or couple to reproduce through normal sexual activity. About 80% of healthy, fertile women are able to conceive within one year if they have intercourse regularly without contraception. intentions between parents? Is it better to be born as the result of a pregnancy that at least one parent intended or one that neither parent intended? If intentions diverge diverge - If a series of approximations to some value get progressively further from it then the series is said to diverge.
The reduction of some term under some evaluation strategy diverges if it does not reach a normal form after a finite number of reductions. , do infants whose conception was intended by their mother fare better than those whose conception was intended by their father? Despite the well-established literature on couples' fertility intentions (1) and on the consequences of unintended pregnancy, (2) these questions have never been subjected to scholarly investigation. In this article, we provide the first analysis of the effects of unintended pregnancy on infants to consider the pregnancy intentions of both parents.
The literature on couples' fertility intentions has examined the relationship between intended and achieved or expected fertility. (3) One key conclusion from this literature is that wives report fairly accurately the fertility intentions of their husbands. (4) Another is that individuals' reported intentions may in part embody em·bod·y
tr.v. em·bod·ied, em·bod·y·ing, em·bod·ies
1. To give a bodily form to; incarnate.
2. To represent in bodily or material form: the resolution of partners' disagreements about intentions, (5) but partners' intentions have significant independent effects on actual fertility. (6) The research also shows that intentions are correlated cor·re·late
v. cor·re·lat·ed, cor·re·lat·ing, cor·re·lates
1. To put or bring into causal, complementary, parallel, or reciprocal relation.
2. with actual or expected fertility, and that some pregnancies that are unintended by mothers are intended (or at least not unintended) by fathers. (7)
This body of work suggests that fathers' intentions "matter" in that they are predictive of achieved fertility. But fathers' intentions may also affect infants' health outcomes; consequently, understanding fathers' intentions can help shape public policies aimed at improving such outcomes.
The literature on the consequences of unintended pregnancy was the subject of a detailed review in a 1995 Institute of Medicine (IOM IOM
See: Index and Option Market ) report. (8) The report documented that unintended pregnancy is associated with delayed initiation of prenatal care prenatal care,
n the health care provided the mother and fetus before childbirth. , maternal MATERNAL. That which belongs to, or comes from the mother: as, maternal authority, maternal relation, maternal estate, maternal line. Vide Line. cigarette smoking during pregnancy, low birth weight and other detrimental det·ri·men·tal
Causing damage or harm; injurious.
detri·men effects in infancy infancy, stage of human development lasting from birth to approximately two years of age. The hallmarks of infancy are physical growth, motor development, vocal development, and cognitive and social development. and childhood. However, in the chapter on the consequences of unintended birth, no mention was made of differences in fertility intention between spouses or partners. This omission omission n. 1) failure to perform an act agreed to, where there is a duty to an individual or the public to act (including omitting to take care) or is required by law. Such an omission may give rise to a lawsuit in the same way as a negligent or improper act. is of concern because, for example, a substantial proportion of births that are unwanted by mothers are wanted by fathers. (9) As a result of this finding, some researchers have questioned a definition of unwantedness that is based on the mother's fertility intentions alone. (10) Montgomery Montgomery, city, United States
Montgomery, city (1990 pop. 187,106), state capital and seat of Montgomery co., E central Ala., near the head of navigation on the Alabama River just below the confluence of the Coosa and Tallapoosa rivers, and in the rich has gone so far as to argue that "in an area as important as unintended pregnancy, very little additional progress can be expected without serious attention to men's perceptions and behavior." (11)
Additionally, the IOM report acknowledged that most studies of the consequences of unintended pregnancy lack an adequate research design to distinguish the effects of fertility intention from those of disadvantaged This article or section may contain original research or unverified claims.
Please help Wikipedia by adding references. See the for details.
This article has been tagged since September 2007. family back ground, with which it is associated. Disadvantaged background is a risk factor for poor infant health and may account for adverse childhood outcomes after an unintended pregnancy. Recent investigations of these hypotheses have compared health and developmental outcomes among siblings siblings npl (formal) → frères et sœurs mpl (de mêmes parents) who differ in their mother's pregnancy intention, or have included detailed controls for family background. (12) Estimates based on these methods suggest few adverse effects of unintended pregnancy on infant and child health and development. But this work also relied exclusively on the mother's pregnancy intention.
In this article, we have two objectives. First, we seek to broaden the set of outcomes used to evaluate the utility of incorporating men's fertility intentions. Rather than study whether fathers' intentions help determine achieved or expected fertility, we ask whether such information is useful in predicting child well-being. Second, we seek to expand the literature on the consequences of unintended fertility for children to include fathers' intentions.
Pregnancy intention may be associated with infant and child health for several reasons. Women with unintended pregnancies may fail to engage in healthy behaviors, such as obtaining prenatal care, because of delay in recognizing the conception or denial that it has occurred. (13) Parental disagreements over the desirability of the pregnancy could exacerbate or mediate MEDIATE, POWERS. Those incident to primary powers, given by a principal to his agent. For example, the general authority given to collect, receive and pay debts due by or to the principal is a primary power. such consequences. For example, a father who wanted the pregnancy could motivate a mother who did not to seek timely prenatal care, whereas if neither partner intended to conceive conceive /con·ceive/ (kon-sev´)
1. to become pregnant.
2. take in, grasp, or form in the mind.
1. To become pregnant.
2. , the mother's motivation to get proper care may remain low.
Furthermore, children whose conception was unintended may receive a reduced share of family resources if the cost of adjustment to the unplanned birth falls most heavily on them. Studies of European European
emanating from or pertaining to Europe.
European bat lyssavirus
European beech tree
see cryptococcosis. women denied abortion have emphasized this mechanism to explain poor social development associated with unwanted pregnancy unwanted pregnancy Obstetrics A pregnancy that is not desired by one or both biologic parents. See Teen pregnancy. . (14) Again, parents' disagreement regarding pregnancy intentions may affect the severity of the consequences. More resources may be withheld from the child if both parents did not want the pregnancy than if one or both parents intended it.
Assuming that unintended pregnancy is harmful to infant health, two hypotheses regarding the effects of parents' diverging di·verge
v. di·verged, di·verg·ing, di·verg·es
1. To go or extend in different directions from a common point; branch out.
2. To differ, as in opinion or manner.
3. fertility intentions are plausible. The dose-response hypothesis posits that it is better for a child if both parents wanted the pregnancy than if one or both did not, and it is better if at least one parent intended the pregnancy than if neither did. According to according to
1. As stated or indicated by; on the authority of: according to historians.
2. In keeping with: according to instructions.
3. the maternal predominance pre·dom·i·nance also pre·dom·i·nan·cy
The state or quality of being predominant; preponderance.
Noun 1. predominance - the state of being predominant over others
predomination, prepotency hypothesis, if only one parent intended the pregnancy, it is better for the child if that parent was the mother.
The justification for the maternal predominance hypothesis is evidence that mothers' characteristics, such as educational attainment Educational attainment is a term commonly used by statisticans to refer to the highest degree of education an individual has completed.
The US Census Bureau Glossary defines educational attainment as "the highest level of education completed in terms of the , are stronger predictors of children's health Children's Health Definition
Children's health encompasses the physical, mental, emotional, and social well-being of children from infancy through adolescence. and development than are fathers' characteristics. * (15) Presumably pre·sum·a·ble
That can be presumed or taken for granted; reasonable as a supposition: presumable causes of the disaster. , mothers have greater influence on health and development in infancy and early childhood because they are more directly involved than fathers in the care of children at these ages. By the same reasoning, we would also expect the effect of mothers' intention (relative to fathers') to be stronger for children born to unmarried women.
While we believe that these hypotheses are sensible, others are possible. For example, if mothers treat infants and children equally well regardless of fertility intention, but fathers favor their intended children, then fathers' intention might have greater influence on infant and child outcomes.
One principal goal of our research is to identify associations between different combinations of parental pregnancy intentions and infant health. The results could form the empirical basis of future research on specific causal causal /cau·sal/ (kaw´z'l) pertaining to, involving, or indicating a cause.
relating to or emanating from cause. mechanisms underlying these associations.
DATA AND METHODS
Outcomes and Control Variables
To examine these hypotheses, we use data from the 1979-1992 National Longitudinal lon·gi·tu·di·nal
Running in the direction of the long axis of the body or any of its parts. Survey of Youth (NLSY NLSY National Longitudinal Survey of Youth (USA) ). The NLSY collects detailed information on the outcomes and controls needed for this study, including marital status marital status,
n the legal standing of a person in regard to his or her marriage state. at birth and pregnancy intention of mother and father for each child, as well as infant health outcomes and parental behaviors during pregnancy and infancy that may be related to health and development.
We focus on infant health for several reasons. First, adverse outcomes such as low birth weight and detrimental parental health behaviors such as cigarette smoking during pregnancy have known long-term Long-term
Three or more years. In the context of accounting, more than 1 year.
1. Of or relating to a gain or loss in the value of a security that has been held over a specific length of time. Compare short-term. effects on children's health and development. (16) Second, because pregnancy intentions are temporally tem·po·ral 1
1. Of, relating to, or limited by time: a temporal dimension; temporal and spatial boundaries.
2. proximate proximate /prox·i·mate/ (prok´si-mit) immediate or nearest.
Closely related in space, time, or order; very near; proximal.
immediate; nearest. to behaviors in pregnancy and infancy, we expect them to have a larger effect on these outcomes than on outcomes later in childhood. Outcomes later in childhood are affected by contemporary attitudes toward the child and the mediating influences of public interventions, most notably, schools. Consistent with this expectation, most evidence for adverse effects of unintended pregnancy is related to pregnancy behaviors and infant outcomes. (17) The outcomes we study are delayed initiation of prenatal care (after the first trimester Noun 1. first trimester - time period extending from the first day of the last menstrual period through 12 weeks of gestation
trimester - a period of three months; especially one of the three three-month periods into which human pregnancy is divided , after the second trimester Noun 1. second trimester - time period extending from the 13th to the 27th week of gestation
trimester - a period of three months; especially one of the three three-month periods into which human pregnancy is divided or not at all); cigarette smoking during pregnancy (any and one or more packs per day); whether the mother ever breastfed; and low birth weight (less than 5.5 pounds).
The NLSY oversamples black, Hispanic Hispanic Multiculture A person of Mexican, Puerto Rican, Cuban, Central or South American, or other Spanish culture or origin, regardless of race Social medicine Any of 17 major Latino subcultures, concentrated in California, Texas, Chicago, Miam, NY, and elsewhere and disadvantaged white women. Because minority status and disadvantaged background are associated with unintended birth, this sample design yields a relatively large number of unintended births and thus increases the precision of estimates of their effects. Therefore, we included race, Hispanic identification and variables related to family background in regression regression, in psychology: see defense mechanism.
In statistics, a process for determining a line or curve that best represents the general trend of a data set. analyses. The unweighted sample statistics are intended to describe the sample only, and not the corresponding cohort cohort /co·hort/ (ko´hort)
1. in epidemiology, a group of individuals sharing a common characteristic and observed over time in the group.
2. in the U.S. population.
A sufficiently large In mathematics, the phrase sufficiently large is used in contexts such as:
verb relate to, concern, refer to, regard, be part of, belong to, apply to, bear on, befit, be relevant to, be appropriate to, appertain to the year of the child's birth, and the survey began in 1979. Second, pregnancy intentions were collected beginning in 1982, and recall bias in pregnancy intentions appears to increase with length of recall. (18)
Sample sizes vary according to the outcome under consideration. For outcomes related to infant health, sample sizes range from 7,400 to 7,800 children. About 75% of these children have at least one sibling sibling /sib·ling/ (sib´ling) any of two or more offspring of the same parents; a brother or sister.
n. who is also in the sample. Thus, in most of our analyses, the sizes of the full sample and the sample of children with a sibling are similar.
In the NLSY, the mother is asked to report the fertility intention of the father when she reports her intention. Researchers have been divided over whether such proxy information (or even direct information) on fathers'
intentions is worth collecting. Thomson, McDonald and Bumpass (19) note that the rationale rationale (rash´nal´),
n the fundamental reasons used as the basis for a decision or action. often provided for excluding male partners from fertility surveys is that men's desires explain "only small marginal variance The discrepancy between what a party to a lawsuit alleges will be proved in pleadings and what the party actually proves at trial.
In Zoning law, an official permit to use property in a manner that departs from the way in which other property in the same locality in couple fertility beyond that explained by wives' desires." But they contend that this conclusion fails to appreciate that the woman's reported fertility intention may represent, in part, the outcome of a joint decision, which could account for why the husband's intention adds little explanatory ex·plan·a·to·ry
Serving or intended to explain: an explanatory paragraph.
ex·plan power. In any case, they find evidence for an important independent role of husbands' intentions on fertility.
Morgan Morgan, American family of financiers and philanthropists.
Junius Spencer Morgan, 1813–90, b. West Springfield, Mass., prospered at investment banking. also finds that wives report husbands' intentions accurately, and concludes that models of fertility including both parents' intentions can be estimated with information gathered from the mother. (20) Williams and Thomson reach a similar conclusion, and suggest that random measurement error in either self-reports or proxy reports of intention is a more significant problem than any systematic error in proxy reports about spouse's intentions. (21) Finally, Goldscheider and Kaufman conclude that the utility of proxy reports of spouse's intention depends on the couple's social situation, and that proxy reports are more reliable for married than for unmarried couples; they also strongly encourage demographers to study male pregnancy This article is about pregnancy in male organisms. For the sympathetic condition, see Couvade.
Male pregnancy is the carrying of one or more embryos or fetuses by the male of any species inside their bodies. intentions. (22)
Ideally, then, we would have independent information on pregnancy intention from a child's mother and father. Unfortunately, we are limited by available data. Nonetheless, since the questions we attempt to answer have never been addressed empirically, let alone addressed with independent assessments of each partner's intention, we believe that proxy information on fathers' pregnancy intentions provides a valuable first step. Given that mothers' reports of fathers' intentions are more reliable for married couples than for others, and that, for smoking and breastfeeding, chi-square tests chi-square test: see statistics. rejected equality across marital statuses of the effects of parents' intentions at the 10% level, we analyze births to married and unmarried women separately.
In most interview years, the Years, The
the seven decades of Eleanor Pargiter’s life. [Br. Lit.: Benét, 1109]
See : Time NLSY collected information on pregnancy intentions from women who identified themselves as pregnant at the time of their annual interview. In years when questions about intentions were not asked, or in cases where a woman did not know or did not acknowledge that she was pregnant when interviewed, questions about pregnancy intentions were asked at the first interview following the birth. As a result, in our sample, about two-thirds of intentions were reported retrospectively ret·ro·spec·tive
1. Looking back on, contemplating, or directed to the past.
2. Looking or directed backward.
3. Applying to or influencing the past; retroactive.
4. (after birth), and one-third prospectively (during pregnancy).
Investigators of unintended pregnancy have for many years questioned the validity of retrospective LAW, RETROSPECTIVE. A retrospective law is one that is to take effect, in point of time, before it was passed.
2. Whenever a law of this kind impairs the obligation of contracts, it is void. 3 Dall. 391. reports of pregnancy intention. The consensus has been that mothers tend to engage in "ex post rationalization rationalization, in psychology: see defense mechanism. " and therefore understate un·der·state
v. un·der·stat·ed, un·der·stat·ing, un·der·states
1. To state with less completeness or truth than seems warranted by the facts.
2. unintended pregnancy in retrospective reports. (23) Furthermore, some researchers have worried that retrospective reporting and ex post rationalization can lead to biased estimates of the consequences of unintended births (although the direction of such bias is unclear). (24) However, we believe that retrospective reports of pregnancy intentions are unlikely to affect our results, for three reasons.
First, information on both parents' intentions is collected from the mother at the same interview; we know of no evidence or other reason to think that mothers would rationalize ra·tion·al·ize
1. To make rational.
2. To devise self-satisfying but false or inconsistent reasons for one's behavior, especially as an unconscious defense mechanism through which irrational acts or feelings are made to appear their own and their partners' intentions differently. Second, the period of retrospective recall in our sample is short (generally one year or less after the birth), and ex post rationalization is thought to increase with time since conception. (25) Third, in a related study, we conducted an extensive analysis of the effects of retrospective reporting in the sample used here. (26) We found no evidence that retrospective reports lead to biased estimates of the extent or consequences of unintended fertility, including in an analysis of a small subsample sub·sam·ple
A sample drawn from a larger sample.
tr.v. sub·sam·pled, sub·sam·pling, sub·sam·ples
To take a subsample from (a larger sample). of births for which intentions were assessed both during pregnancy and after birth. Nonetheless, we include a control for retrospective (versus prospective) report of pregnancy intention in all of our analyses.
Analytic an·a·lyt·ic or an·a·lyt·i·cal
1. Of or relating to analysis or analytics.
2. Expert in or using analysis, especially one who thinks in a logical manner.
3. Psychoanalytic. Techniques
To estimate the effects of parents' pregnancy intention on maternal health Maternal health care is a concept that encompasses preconception, prenatal, and postnatal care. Goals of preconception care can include providing health promotion, screening and interventions for women of reproductive age to reduce risk factors that might affect future pregnancies. behaviors and infant health, we specify an empirical model to relate the various outcomes to parents' pregnancy intentions, controlling for possibly confounding confounding
when the effects of two, or more, processes on results cannot be separated, the results are said to be confounded, a cause of bias in disease studies.
confounding factor factors. * There are four possible combinations of (known) parental intentions: mother and father both intended, neither intended, only the mother intended and only the father intended the pregnancy. Accordingly, the parental intention variables in our statistical models are estimated using three dummy variables This article is not about "dummy variables" as that term is usually understood in mathematics. See free variables and bound variables.
In regression analysis, a dummy variable relating to relating to relate prep → concernant
relating to relate prep → bezüglich +gen, mit Bezug auf +acc these categories. Pregnancies that were intended by both parents form the reference category.
An important statistical problem with the estimation estimation
In mathematics, use of a function or formula to derive a solution or make a prediction. Unlike approximation, it has precise connotations. In statistics, for example, it connotes the careful selection and testing of a function called an estimator. of the effects of parental pregnancy intentions on outcomes related to infant health is the presence of unmeasured characteristics that affect both pregnancy intention and infant health, and therefore might account for estimated associations. To address this problem, we estimate fixed-effects models for mothers, using a sample of women with at least two children. These models identify effects of unintended pregnancies by comparing outcomes of intended and unintended pregnancies in the same family (i.e., between-sibling or within-mother comparisons).
We estimate logit The logit function is an important part of logistic regression: for more information, please see that article.
In mathematics, especially as applied in statistics, the logit regression models, adjusting standard errors for heteroskedasticity and clustering within families, (27) using algorithms The following is a list of the algorithms described in Wikipedia. See also the list of data structures, list of algorithm general topics and list of terms relating to algorithms and data structures. contained in the software Stata Stata (Statistics/Data Analysis) is a statistical program created in 1985 by Statacorp that is used by many businesses and academic institutions around the world. Most of its users work in research, especially in the fields of economics, sociology, political science, and . (28) For models with mother fixed effects (sibling differences), we estimate conditional (fixed-effects) logit models. (29) Families contribute to the likelihood function for an outcome only if some siblings differ in the outcome (e.g., at least one sibling was low-birth-weight, and at least one Was normal-weight). (30) As a result, sample sizes are significantly smaller for the fixed-effects logit models than for the full sample. Nonetheless, the estimates are consistent (unbiased in large samples) for the parameters of interest in the population represented by the entire cross section of siblings. ([dagger])
Consistent with findings from previous studies, (31) we found that in the vast majority of cases, parents' pregnancy intentions at the time of conception agreed (Table 1). Among the 5,514 marital Pertaining to the relationship of Husband and Wife; having to do with marriage.
Marital agreements are contracts that are entered into by individuals who are about to be married, are already married, or are in the process of ending a marriage. births, 92% of conceptions that had been intended by the mother had also been intended by the father. When the mother had intended the pregnancy and the father had not, most often he had considered it mistimed mis·time
tr.v. mis·timed, mis·tim·ing, mis·times
To time inaccurately or inappropriately; misjudge the timing of: The basketball team mistimed the final play and lost the game. (3%) or his intention could not be determined (4%); in fewer than 1% of cases had the father not wanted a pregnancy at any time. In accordance Accordance is Bible Study Software for Macintosh developed by OakTree Software, Inc.
As well as a standalone program, it is the base software packaged by Zondervan in their Bible Study suites for Macintosh. with the findings of earlier studies, (32) in about one-quarter of cases in which the mother considered the pregnancy mistimed or unwanted, the father had intended it. The reverse, however, is not true: When the pregnancy was unintended by the father, only about one in 10 mothers reported the pregnancy to be intended (not shown).
The 2,614 nonmarital births were characterized char·ac·ter·ize
tr.v. character·ized, character·iz·ing, character·iz·es
1. To describe the qualities or peculiarities of: characterized the warden as ruthless.
2. by greater parental disagreement than those occurring within marriage. In particular, only 79% of pregnancies that had been intended by the mother had also been intended by the father.
Table 1 contains a large number of categories, and many of the cell sizes are small. In the remainder of the article, we collapse these categories into six: Both parents intended the pregnancy; neither intended the pregnancy; only the mother intended it; only the father intended it; the mother's intent(on was not determined; and the father's intention was not determined (if the mother's intention was determined). Thus, we combine mistimed and unwanted pregnancies into a single category for unintended pregnancies.
Maternal behaviors during pregnancy and infant outcomes appear to be best when both parents intended the pregnancy (Table 2, page 201). Children whose conception had been intended by both parents are the least likely to have mothers who delayed prenatal care beyond the first trimester (15% vs. 22-27%) and who smoked during pregnancy (26% vs. 34-37%); they also are the most likely to have been breastfed (52% vs. 33-44%). They and their mothers have the most advantaged backgrounds. For example, their mothers are the least likely to be black or to have been on welfare during the year of the child's birth; these mothers are the most likely ever to have been married and to have lived with both parents at age 14. Differences in family background could account for differences in child and infant outcomes independent of pregnancy intention. We explore this possibility in our regression models, described below.
More interesting, perhaps, are comparisons regarding pregnancies that were intended by the father only and those intended by the mother only. Consistent with the maternal predominance hypothesis, children whose conception had been intended only by their father were less likely to have been breastfed (33%) than were those whose conception had been intended by their mother alone (44%). They also appear to be less likely to have mothers who smoked and who smoked heavily during pregnancy, but these differences were not statistically significant. This pattern could reflect that a much larger proportion of these children have mothers who are black (46%, compared with 28% of those whose conception had been intended only by their mother), because black women were less likely to breastfeed breast·feed or breast-feed
v. breast-fed , breast-feed·ing, breast-feeds
To feed (a baby) mother's milk from the breast; suckle.
To breastfeed a baby. and less likely to smoke, especially heavily (not shown). In sum, the descriptive data demonstrate the need to control for possibly confounding variables A confounding variable (also confounding factor, lurking variable, a confound, or confounder) is an extraneous variable in a statistical or research model that should have been experimentally controlled, but was not. in comparing outcomes between births following intended and unintended pregnancies.
Multivariate The use of multiple variables in a forecasting model. Analyses
Results from the logistic regression In statistics, logistic regression is a regression model for binomially distributed response/dependent variables. It is useful for modeling the probability of an event occurring as a function of other factors. analyses show that among infants born to unmarried women, those whose conception had been intended by neither parent were significantly more likely than those whose parents had both wanted the pregnancy to have a mother who delayed prenatal care (coefficient coefficient /co·ef·fi·cient/ (ko?ah-fish´int)
1. an expression of the change or effect produced by variation in certain factors, or of the ratio between two different quantities.
2. , 0.5 for the entire sample and 0.7 in the fixed-effects model--Table 3). This finding is consistent with the dose-response hypothesis, since not being wanted by both parents (relative to being wanted by both) may be the strongest indicator of an unintended pregnancy. On the other hand, there is no consistent evidence for other elements of the dose-response hypothesis: A pregnancy's being intended by only one parent is not clearly better than its being intended by neither. Nor is there evidence to support the maternal predominance hypothesis.
A question raised in the literature is whether fathers' intentions add explanatory power to mothers' intentions in the determination of pregnancy-related outcomes and infant health. To examine this issue, we tested the joint hypothesis that the effect of a pregnancy's being intended only by the father equals the effect of its being intended by neither parent and the effect of a pregnancy's being intended only by the mother equals that of its being intended by both parents. Put differently Adv. 1. put differently - otherwise stated; "in other words, we are broke"
in other words , we tested whether, if the mother did not intend the pregnancy, there is no benefit if the father did and if the mother intended the pregnancy, there is no harm if the father did not. The p-values for the chi-square test corresponding to this hypothesis are presented in the table rows labeled "father irrelevant." For prenatal care, since this test is significant (p [less than or equal to] .05) in the fixed-effects analysis (Table 3), we reject the hypothesis that the father's intention is irrelevant.
We also tested the restriction, suggested by the pattern of results in Table 3, that children do better if their conception was intended by both parents than if it was not intended by one or both parents. Specifically, we tested for equality of all three effects (coefficients) listed in the table for each model and report the p-values from the associated chi-square tests in the rows labeled "equality of effects." We cannot reject the hypothesis of equality, which suggests that a two-category classification of parental intentions is sufficient.
Estimates related to the incidence of nonmarital women's smoking during pregnancy are not statistically significant regardless of the estimation procedure. For breastfeeding, the results are mixed. Fixed-effect estimates indicate that infants whose conception was unintended by both parents are less likely to be breastfed than are those whose conception was intended by both (coefficient, -0.9). This evidence is consistent with the dose-response hypothesis, but the dose-response hypothesis is not supported by the estimates associated with the other two categories. Estimates related to breastfeeding also do not support the maternal predominance hypothesis. Finally, we cannot reject the hypothesis that father's intention is irrelevant or the hypothesis that what matters is whether both parents intended the pregnancy. We prefer the fixed-effect estimates because they are not biased by unmeasured family background factors. However, since they were based on a relatively small sample, they are imprecise im·pre·cise
impre·cisely adv. , and statistical tests have less power to detect true differences.
For births to married women, few results from the regression analyses are statistically significant. Furthermore, only the estimates associated with breastfeeding suggest a substantial relationship--albeit an imprecisely im·pre·cise
impre·cisely adv. estimated one. For breastfeeding, all of the estimates are negative, suggesting that children whose conceptions were unintended are relatively unlikely to be breastfed. Tests of whether fathers are irrelevant and whether what matters is that both parents intend the pregnancy are mixed. For the fixed-effects model, we reject the hypothesis that fathers are irrelevant.
Generally, there appears to be little statistical basis for discriminating dis·crim·i·nat·ing
a. Able to recognize or draw fine distinctions; perceptive.
b. Showing careful judgment or fine taste: among the three categories in which at least one parent did not intend the pregnancy. We therefore combined these into a single category, representing pregnancies that were unintended by either parent, and present the results of this alternative classification in Table 4. We include three outcomes that were excluded from the previous analysis because they occurred infrequently in·fre·quent
1. Not occurring regularly; occasional or rare: an infrequent guest.
2. and sample sizes in some categories of parental pregnancy intention were too small for meaningful analysis (initiated prenatal care after the second trimester, smoked one or more packs per day and low birth weight).
There is relatively robust evidence that when either parent did not intend the pregnancy, the woman has an elevated likelihood of initiating prenatal care after the first trimester and a reduced likelihood of breastfeeding. There is little evidence of an increased risk of any smoking during pregnancy, and the evidence regarding the risk of heavy smoking during unintended pregnancies is mixed, showing a statistically significant effect for marital births in the cross-sectional analysis Cross-sectional analysis
Assessment of relationships among a cross-section of firms, countries, or some other variable at one particular time. . When mother fixed effects are included, the effect is not statistically significant, but the size of this effect may be considered important for two reasons. First, a small proportion of women smoke heavily during pregnancy (about 9% in this sample). Evaluated at this sample mean, the logit coefficient of about 0.4 translates into an increase in the probability of heavy smoking of about three percentage points, or about one-third. Second, since the evidence for adverse effects of heavy smoking during pregnancy for infant health and development is overwhelming, (33) even small changes in such behavior may have important health consequences.
Unintended pregnancy is thought to increase risks for adverse health outcomes in infancy. Previous research, including our earlier work, found much less evidence for such effects after controlling for mothers' socioeconomic so·ci·o·ec·o·nom·ic
Of or involving both social and economic factors.
of or involving economic and social factors
Adj. 1. disadvantage (i.e., in comparisons of siblings). However, all studies of the effects of unintended fertility on infant health that we are aware of have relied exclusively on mothers' pregnancy intentions. Ours is the first to investigate the effect of fathers' intentions on infant health and related behaviors during pregnancy.
We found some evidence that fathers' pregnancy intentions matter. Specifically, a child whose conception was intended by her mother generally appears to do better if the pregnancy was also intended by her father. However, there was no evidence that a child whose conception was not intended by his mother does better if the pregnancy was intended by his father. This pattern of results suggests a new classification of unintended pregnancy: conceptions intended by both parents and those not intended by one or both parents. Children born following an unintended pregnancy so defined are at elevated risk of having a mother who delayed prenatal care, did not breastfeed and, possibly, smoked heavily during pregnancy.
These findings are consistent with earlier literature that has examined couples' pregnancy intentions and achieved fertility, in that they reveal statistically significant, meaningful differences between some categories of pregnancies that can be identified only by using information on each parent's pregnancy intention.
Our results are based on mothers' reports of fathers' pregnancy intentions. Therefore, we cannot contribute to the debate over the value of collecting independent information on pregnancy intention from fathers as compared with obtaining information from mothers about both parents' pregnancy intentions. But our results do suggest that future research should examine the value of such information for studies of the consequences of unintended pregnancy for infant and child health and development.
TABLE 1. Percentage distribution of births, by father's pregnancy intention, according to mother's intention and marital status, 1979-1992 National Longitudinal Survey of Youth Mother's N Father's intention intention Intended Mistimed Unwanted Married women 5,514 66.8 16.2 3.5 Intended 3,556 92.1 3.2 0.6 Mistimed 1,149 26.9 63.9 4.4 Unwanted 241 26.6 13.7 50.6 Not determined 568 6.2 1.8 0.0 Unmarried women 2,614 41.8 21.3 14.6 Intended 920 79.2 8.4 2.9 Mistimed 928 29.1 45.9 14.7 Unwanted 418 20.8 11.2 51.2 Not determined 348 2.0 2.0 1.4 Mother's N Father's intention intention Not Total determined Married women 5,514 13.5 100.0 Intended 3,556 4.1 100.0 Mistimed 1,149 4.8 100.0 Unwanted 241 9.1 100.0 Not determined 568 92.1 100.0 Unmarried women 2,614 22.3 100.0 Intended 920 9.5 100.0 Mistimed 928 10.3 100.0 Unwanted 418 16.8 100.0 Not determined 348 94.5 100.0 Notes: Marital status is measured as of the first interview after the birth. Father's intention is based on mother's report. TABLE 2. Selected outcomes of pregnancies among NLSY respondents, and child and maternal characteristics, by parents' pregnancy intention Variable Both Neither intended intended (N=4,004) (N=1,763) Outcomes Prenatal care initiated (%) After 1st trimester 15.1 23.2 * After 2nd trimester 4.9 6.5 * Smoked during pregnancy (%) Any 26.3 35.2 * [greater than or equal to] 1 pack/day 7.6 11.1 * Low birth weight (%) 7.0 7.7 Ever breastfed (%) 51.8 39.6 * Child characteristics Male (%) 51.4 50.5 Firstborn (%) 47.8 42.4 * Maternal characteristics Hispanic (%) 19.6 16.2 * Black, non- Hispanic (%) 17.8 33.7 * AFQT score (percentile) 39.5 33.4 * Lived with both parents, age 14 (%) 69.3 58.4 * Age (mean) ([double dagger]) 24.6 23.2 * Education (mean years) ([double dagger]) 12.3 11.8 * Never-married (%) ([double dagger]) 11.6 34.8 * Divorced/ separated (%) ([double dagger]) 6.6 11.9 * AFDC recipient (%) ([double dagger]) 9.7 22.0 * Retrospective pregnancy intention 66.3 69.4 * Variable Father only intended (N=730) Outcomes Prenatal care initiated After 1st trimester 26.7 * After 2nd trimester 6.5 Smoked during pregnancy (%) Any 33.9 * [greater than or equal to] 1 pack/day 8.3 Low birth weight (%) 8.2 Ever breastfed (%) 33.3 * Child characteristics Male (%) 49.2 Firstborn (%) 35.3 * Maternal characteristics Hispanic (%) 19.5 Black, non- Hispanic (%) 45.5 * AFQT score (percentile) 25.8 * Lived with both parents, age 14 (%) 53.0 * Age (mean) ([double dagger]) 23.8 * Education (mean years) ([double dagger]) 11.7 * Never-married (%) ([double dagger]) 34.2 * Divorced/ separated (%) ([double dagger]) 14.7 * AFDC recipient (%) ([double dagger]) 23.6 * Retrospective pregnancy intention 66.2 Variable Mother only intended (N=239) Outcomes Prenatal care initiated After 1st trimester 21.8 * After 2nd trimester 5.0 Smoked during pregnancy (%) Any 37.3 * [greater than or equal to] 1 pack/day 9.9 Low birth weight (%) 10.4 * Ever breastfed (%) 43.9 *,([dagger]) Child characteristics Male (%) 56.5 ([dagger]) Firstborn (%) 47.3 *,([dagger]) Maternal characteristics Hispanic (%) 19.2 Black, non- Hispanic (%) 28.0 *,([dagger]) AFQT score (percentile) 30.2 *,([dagger]) Lived with both parents, age 14 (%) 57.7 * Age (mean) ([double dagger]) 23.2 *,([dagger]) Education (mean years) ([double dagger]) 11.5 * Never-married (%) ([double dagger]) 31.8 * Divorced/ separated (%) ([double dagger]) 11.7 * AFDC recipient (%) ([double dagger]) 23.1 * Retrospective pregnancy intention 74.1 ([dagger]) * Significantly different from the figure for "both intended" at p<.05. ([dagger]) Significantly different from the figure for"father only intended" at p<.05. ([double dagger]) Measured in year of child's birth. Notes: Results for couples for which either parent's intention was not determined are not shown. AFQT=Armed Forces Qualifications Test. AFDC=Aid to Families with Dependent Children. TABLE 3. Coefficients from logit analyses (and standard errors) indicating the effects of parents' pregnancy intentions on maternal behaviors related to infant health, by mother's marital status and type of analysis Outcome Unmarried Cross- sectional Prenatal care after first trimester (N=2,369) Neither parent intended 0.46 * (.13) Mother only intended 0.48 * (.25) Father only intended 0.64 * (.16) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .08 Equality of effects ([section]) .50 Smoked during pregnancy (N=2,427) Neither parent intended -0.02 (.12) Mother only intended 0.14 (.23) Father only intended 0.10 (.16) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .61 Equality of effects ([section]) .64 Ever breastfed (N=2,476) Neither parent intended 0.04 (.14) Mother only intended 0.57 * (.25) Father only intended -0.12 (.17) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) Equality of effects ([section]) Outcome Unmarried Fixed- effects Prenatal care after first trimester (N=687) Neither parent intended 0.65 * (.26) Mother only intended 1.43 * (.52) Father only intended 0.59 * (.29) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .02 Equality of effects ([section]) .29 Smoked during pregnancy (N=292) Neither parent intended -0.14 (.41) Mother only intended 1.10 (.99) Father only intended 0.37 (.49) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .33 Equality of effects ([section]) .35 Ever breastfed (N=286) Neither parent intended -.88 * (.45) Mother only intended -.74 (1.26) Father only intended -0.93 ([dagger]) (.55) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .84 Equality of effects ([section]) .98 Outcome Married Cross- sectional Prenatal care after first trimester (N=5,058) Neither parent intended 0.18 ([dagger]) (.11) Mother only intended -0.03 (.25) Father only intended 0.48 * (.14) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .20 Equality of effects ([section]) .10 Smoked during pregnancy (N=5,176) Neither parent intended 0.36 * (.10) Mother only intended 0.29 (.23) Father only intended -0.29 * (.15) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .44 Equality of effects ([section]) .90 Ever breastfed (N=5,273) Neither parent intended -0.13 (.09) Mother only intended -0.27 (.21) Father only intended -0.25 ([dagger]) (.14) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .31 Equality of effects ([section]) .63 Outcome Married Fixed effects Prenatal care after first trimester (N=1,051) Neither parent intended 0.16 (.20) Mother only intended 0.21 (.50) Father only intended 0.55 ([dagger]) (.28) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .42 Equality of effects ([section]) .47 Smoked during pregnancy (N=440) Neither parent intended 0.01 (.32) Mother only intended 1.47 ([dagger]) (.82) Father only intended -0.02 (.54) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .20 Equality of effects ([section]) .24 Ever breastfed (N=923) Neither parent intended -0.28 (.22) Mother only intended -1.83 * (.74) Father only intended -0.29 (.31) Both intended ref p-value from [chi square] Father irrelevant ([double dagger]) .05 Equality of effects ([section]) .11 * p [less than or equal to] .05. ([dagger]) p [less than or equal to] .10. ([double dagger]) Test of the joint hypothesis that the effect of mother only intended equals the effect of both parents intended and the effect of father only intended equals the effect of neither parent intended. ([section]) Test that the three coefficients shown are equal. Notes: ref=reference group. Standard errors are adjusted for heteroskedasticity and clustering among siblings. In addition to the categories listed in the table, analyses control for undetermined mother's pregnancy intention, undetermined father's pregnancy intention (if mother's intention is determined); region and urban residence in the year following the birth; mother's race and ethnicity; child's sex, birth order and year of birth; and characteristics of the mother's household when she was 14 (whether both parents were present, whether the household received newspapers or magazines, whether any household member had a library card and educational attainment of the mother's mother). The model also includes a control for the mother's score on the Armed Forces Qualifications Test, administered to the sample in 1980, and for whether the mother reported pregnancy intention during pregnancy or after delivery. In the unmarried sample, one marital status dummy (divorced/separated vs. never married) is included. In the fixed-effects analyses, effects are identified by variation among siblings; effects of explanatory variables that do not vary among siblings cannot be estimated; and observations contribute to the likelihood function only if there is variation within mother (i.e., among siblings) in the outcome. TABLE 4. Coefficients from logit analyses (and standard errors) indicating the effects of a pregnancy's being unintended by either parent on selected outcomes, by mother's marital status and type of analysis Outcome Unmarried Cross-sectional N Coefficient Prenatal care After first trimester 2,369 0.52 * (.12) After second trimester 2,369 0.23 (.21) Smoked during pregnancy Any 2,427 0.03 (.11) [greater than or equal to] 1 pack/day 2,427 -0.04 (.02) Low birth weight 2,444 0.01 (.17) Ever breastfed 2,476 0.05 (.12) Outcome Unmarried Fixed-effects N Coefficient Prenatal care After first trimester 687 0.69 * (.23) After second trimester 232 0.16 (.51) Smoked during pregnancy Any 292 0.14 (.35) [greater than or equal to] 1 pack/day 208 0.45 (.50) Low birth weight 356 -0.21 (.35) Ever breastfed 286 -0.89 * (.41) Outcome Married Cross-sectional N Coefficient Prenatal care After first trimester 5,058 0.25 * (.09) After second trimester 5,058 0.16 (.15) Smoked during pregnancy Any 5,176 0.33 * (.08) [greater than or equal to] 1 pack/day 5,176 0.27 * (.13) Low birth weight 5,203 -0.24 (.15) Ever breastfed 5,273 -0.17 * (.07) Outcome Married Fixed-effects N Coefficient Prenatal care After first trimester 1,051 0.27 ([dagger]) (.17) After second trimester 420 0.01 (.30) Smoked during pregnancy Any 440 0.19 (.27) [greater than or equal to] 1 pack/day 253 0.39 (.38) Low birth weight 427 0.47 (.31) Ever breastfed 923 -0.33 ([dagger]) (.19) * p [less than or equal to] .05. ([dagger]) p [less than or equal to] .10. Notes: Standard errors are adjusted for heteroskedasticity and clustering among siblings. In addition to the categories listed in the table, analyses control for undetermined mother's pregnancy intention, undetermined father's pregnancy intention (if mother's intention is determined); region and urban residence in the year following the birth; mother's race and ethnicity; child's sex, birth order and year of birth; and characteristics of the mother's household when she was 14 (whether both parents were present, whether the household received newspapers or magazines, whether any household member had a library card and educational attainment of the mother's mother). The model also includes a control for the mother's score on the Armed Forces Qualifications Test, administered to the sample in 1980, and for whether the mother reported pregnancy intention during pregnancy or after delivery. In the unmarried sample, one marital status dummy (divorced/separated vs. never married) is included. In the fixed-effects analyses, effects are identified by variation among siblings; effects of explanatory variables that do not vary among siblings cannot be estimated; and observations contribute to the likelihood function only if there is variation within mother (i.e., among siblings) in the outcome.
Acknowledgments See About this product.
An earlier version of this paper was presented at the annual meeting of the Population Association of America, Mar. 31, 2001, Washington DC. The research on which this article is based was supported by grant HD-35353 from the National Institute of Child Health and Human Development. The authors thank Steven P. Martin and seminar participants at Baruch College Baruch College: see New York, City University of. and Columbia University Columbia University, mainly in New York City; founded 1754 as King's College by grant of King George II; first college in New York City, fifth oldest in the United States; one of the eight Ivy League institutions. for comments on this work.
* The literature on this point is quite large for developing countries but is more equivocal EQUIVOCAL. What has a double sense.
2. In the construction of contracts, it is a general rule that when an expression may be taken in two senses, that shall be preferred which gives it effect. Vide Ambiguity; Construction; Interpretation; and Dig. for the United States United States, officially United States of America, republic (2005 est. pop. 295,734,000), 3,539,227 sq mi (9,166,598 sq km), North America. The United States is the world's third largest country in population and the fourth largest country in area. .
* The equation is [Y.sub.ij] = [[alpha].sub.o] + [X.sub.ij][beta] + [[gamma].sub.1]Mom[U.sub.ij] + [[gamma].sub.2]Dad[U.sub.ij] + [[gamma].sub.3]Mom[U.sub.ij] * Dad[U.sub.ij] + [[psi PSI - Portable Scheme Interpreter ].sub.j] + [[epsilon].sub.ij], where i is an index of children, and j an index of mothers. [Y.sub.ij] is an outcome related to infant health (e.g., birth weight or maternal smoking during pregnancy), and [X.sub.ij] are exogenous Exogenous
Describes facts outside the control of the firm. Converse of endogenous. measures of family background and maternal and child characteristics (e.g., the child's sex and year of birth, the mother's race and whether she lived with both parents at age 14). MomU and DadU are indicator variables for a pregnancy unintended by the mother and father, respectively. We interacted mother's and father's intentions (MomU * DadU) to study the consequences of parental disagreement or agreement in pregnancy intention. Also, [[psi].sub.j] represents unmeasured, fixed maternal characteristics (i.e., mother fixed effects) associated with maternal behaviors and infant health.
([dagger]) We also estimated linear probability models The linear probability specification of a binary regression model assumes that, for binary outcome and regressor vector with and without fixed effects that include all observations. Our conclusions are not sensitive to the choice of model (logit or linear probability).
(1.) Thomson E, McDonald E and LL Bumpass, Fertility desires and fertility: his, hers and theirs, Demography demography (dĭmŏg`rəfē), science of human population. Demography represents a fundamental approach to the understanding of human society. , 1990, 27(4):579-588; Morgan SP, Individual and couple intentions for more children: a research note, Demography, 1985, 22(1):125-132; and Williams L, Determinants of couple agreement in U.S. fertility decisions, Family Planning family planning
Use of measures designed to regulate the number and spacing of children within a family, largely to curb population growth and ensure each family’s access to limited resources. Perspectives, 1994, 26(4):169-173.
(2.) Brown SS and Eisenberg L, eds., The Best Intentions: Unintended Pregnancy and the Well-Being of Children and Families, Washington, DC: National Academy Press, 1995.
(3.) Thomson E, McDonald E and Bumpass LL, 1990, op. cit. (see reference 1); Clifford WB, Lake JL and Brannon YS, Spousal spou·sal
1. Of or relating to marriage; nuptial.
2. Of or relating to a spouse.
Marriage; nuptials. Often used in the plural. agreement on the value of children and fertility behavior, Population and Environment, 1987, 9(2):148-159; Thomson E, Individual and couple utility of children, Demography, 1983, 20(4):507-518; and Williams R and Thomson E, Can spouses be trusted? a look at husband/wife proxy reports, Demography, 1985, 22(1):115-123.
(4.) Morgan SP, 1985, op. cit. (see reference 1); and Williams L and Thomson E, 1985, op cit Op Cit Opere Citato (Latin: In the Work Mentioned) . (see reference 3).
(5.) Thomson E, McDonald E and Bumpass, LL, 1990, op. cit. (see reference 1); and Thomson E, 1983, op. cit. (see reference 3).
(6.) Thomson E, McDonald E and Bumpass LL, 1990, op. cit. (see reference 1).
(7.) Williams L, 1994, op. cit. (see reference 1); and Thomson E, McDonald E and Bumpass LL, 1990, op. cit. (see reference 1).
(8.) Brown SS and Eisenberg L, 1995, op. cit. (see reference 2).
(9.) Williams L, 1994, op. cit. (see reference 1); and Thomson E, McDonald E and Bumpass LL, 1990, op. cit. (see reference 1).
(10.) Thomson E, McDonald E and Bumpass LL, 1990, op. cit. (see reference 1), p. 586.
(11.) Montgomery MR, Comments on men, women, and unintended pregnancy, Population and Development Review, 1996, 22(Suppl.):100-108.
(12.) Joyce T, Kaestner R and Korenman S, The effect of pregnancy intention on child development, Demography, 2000, 37(1):83-94.
(13.) Brown SS and Eisenberg L, 1995, op. cit. (see reference 2).
(14.) David HP et al., Born Unwanted: Developmental Effects of Denied Abortion, New York New York, state, United States
New York, Middle Atlantic state of the United States. It is bordered by Vermont, Massachusetts, Connecticut, and the Atlantic Ocean (E), New Jersey and Pennsylvania (S), Lakes Erie and Ontario and the Canadian province of : Springer springer
a North American term commonly used to describe heifers close to term with their first calf. , 1988.
(15.) Bledsoe CH et al., eds., Critical Perspectives on Schooling and Fertility in the Developing World, Washington, DC: National Academy Press, 1999; Duflo E, Grandmothers and granddaughters: old age pension and intra-household allocation The apportionment or designation of an item for a specific purpose or to a particular place.
In the law of trusts, the allocation of cash dividends earned by a stock that makes up the principal of a trust for a beneficiary usually means that the dividends will be treated as in South Africa South Africa, Afrikaans Suid-Afrika, officially Republic of South Africa, republic (2005 est. pop. 44,344,000), 471,442 sq mi (1,221,037 sq km), S Africa. , Working Paper, Cambridge, MA: National Bureau of Economic Research The National Bureau of Economic Research (NBER) is a "private, nonprofit, nonpartisan research organization" dedicated to studying the science and empirics of economics, especially the American economy. , 2000, No. 8061; and Hanson TL, McLanahan SS and Thomson E, Economic resources, parental practices, and children's well-being, in: Duncan GJ and Brooks-Gunn J, eds., Consequences of Growing Up Poor, New York: Russell Sage Russell Sage (4 August 1816 - 22 July 1906) was a financier and politician from New York.
Sage was born at Verona in Oneida County, New York. He received a public school education and worked as a farm hand until he was 15, when he became an errand boy in a grocery conducted Foundation, 1997.
(16.) Chaikind S and Corman H, The impact of low birth weight on special education costs, Journal of Health Economics, 1991, 10(3):291-311; and Hack The source code of a program (noun); writing the source code of a program (verb). The phrase "nobody has a package for that; it must be done through a hack" means someone has to write programming code to solve the problem because there is no pre-written software that does it. M et al., Outcomes in young adulthood for very-low-birth-weight infants, New England Journal of Medicine The New England Journal of Medicine (New Engl J Med or NEJM) is an English-language peer-reviewed medical journal published by the Massachusetts Medical Society. It is one of the most popular and widely-read peer-reviewed general medical journals in the world. , 2002, 346(3):149-157.
(17.) Brown SS and Eisenberg L, 1995, op. cit. (see reference 2).
(18.) Bankole A and Westoff CF, The consistency and validity of reproductive re·pro·duc·tive
1. Of or relating to reproduction.
2. Tending to reproduce.
subserving or pertaining to reproduction. attitudes: evidence from Morocco Morocco, country, Africa
Morocco (mərŏk`ō), officially Kingdom of Morocco, kingdom (2005 est. pop. 32,726,000), 171,834 sq mi (445,050 sq km), NW Africa. , Journal of Biosocial bi·o·so·cial
Of or having to do with the interaction of biological and social forces: the biosocial aspects of disease.
bi Science, 1998, 30(4):438-455.
(19.) Thomson E, McDonald E and LL Bumpass 1990, op. cit. (see reference 1), p. 579.
(20.) Morgan SP, 1985, op. cit. (see reference 1).
(21.) Williams R and Thomson E, 1985 op. cit. (see reference 3).
(22.) Goldscheider FK and Kaufman G, Fertility and commitment: bringing men back in, Population and Development Review, 1996, 22(Suppl.): 87-99.
(23.) Westoff CF and Ryder NB, The predictive validity In psychometrics, predictive validity is the extent to which a scale predicts scores on some criterion measure.
For example, the validity of a cognitive test for job performance is the correlation between test scores and, for example, supervisor performance ratings. of reproductive intentions, Demography, 1977, 14(4):431-453.
(24.) Rosenzweig MR and Wolpin KI, Maternal expectations and ex post realizations, Journal of Human Resources The fancy word for "people." The human resources department within an organization, years ago known as the "personnel department," manages the administrative aspects of the employees. , 1993, 28(2):205-227.
(25.) Bankole A and Westoff CF, 1998, op. cit. (see reference 18).
(26.) Joyce T, Kaestner R and Korenman S, On the validity of retrospective assessments of pregnancy intention, Demography, 2002, 39(1): 199-213.
(27.) White H, A heteroskedasticity-consistent covariance matrix In statistics and probability theory, the covariance matrix is a matrix of covariances between elements of a vector. It is the natural generalization to higher dimensions of the concept of the variance of a scalar-valued random variable. estimator and a direct test for heteroskedasticity, Econometrica, 1980, 48(4): 817-838.
(28.) Stata Corp., Stata Reference Manual Release 7, College Station, TX: Stata Press, 2001.
(29.) Chamberlain Chamberlain may refer to:
A measure of the degree to which returns on two risky assets move in tandem. A positive covariance means that asset returns move together. A negative covariance means returns vary inversely. with qualitative data, Review of Economic Studies, 1980, 47(1):225-238.
(31.) Williams L, 1994, op. cit. (see reference 1).
(33.) Abel EL, Smoking during pregnancy: a review of effects on growth and development of offspring off·spring
1. The progeny or descendants of a person, animal, or plant considered as a group.
2. A child of particular parentage. , Human Biology Human biology is an interdisciplinary academic field of biology, biological anthropology, and medicine which focuses on humans; it is closely related to primate biology, and a number of other fields. , 1980, 52(4):593-625; Li CQ et al., The impact on infant birth weight and gestational age ges·ta·tion·al age
See estimated gestational age.
The estimated age of a fetus expressed in weeks, calculated from the first day of the last normal menstrual period. of cotinine-validated smoking reduction during pregnancy, Journal of the American Medical Association JAMA: The Journal of the American Medical Association is an international peer-reviewed general medical journal, published 48 times per year by the American Medical Association. JAMA is the most widely circulated medical journal in the world. , 1993, 269(12):1519-1524; and Sexton sex·ton
An employee or officer of a church who is responsible for the care and upkeep of church property and sometimes for ringing bells and digging graves. M and Hebel RH, A clinical trial of change in maternal smoking and its effect on birth weight, Journal of the American Medical Association, 1993, 251(7):911-915.
Author contact: sanders San´ders
n. 1. An old name of sandalwood, now applied only to the red sandalwood. See under Sandalwood. firstname.lastname@example.org
Sanders Korenman is professor of public affairs Those public information, command information, and community relations activities directed toward both the external and internal publics with interest in the Department of Defense. Also called PA. See also command information; community relations; public information. , Baruch College, New York, and research associate, National Bureau of Economic Research (NBER NBER National Bureau of Economic Research (Cambridge, MA)
NBER Nittany and Bald Eagle Railroad Company ), New York. Robert Kaestner is professor of public health, University of Illinois at Chicago This article is about the University of Illinois at Chicago. For other uses, see University of Illinois at Chicago (disambiguation).
UIC participates in NCAA Division I Horizon League competition as the UIC Flames in several sports, most notably Basketball. , and research associate, NBER. Ted Joyce is professor of economics, Baruch College, and research associate, NBER.