Comparison of Stock Prices for Selected Trade and Business Information Companies.

COMPARISON OF STOCK PRICES FOR SELECTED TRADE AND BUSINESS INFORMATION
COMPANIES, FROM 1/1/01 & 1/1/02 TO 3/31/02

                        Close on   Close On   Close On     % Chg.
Company                   1/1/01     1/1/02    3/31/02  from 1/1/01

Dow Jones (NY)           $ 56.63    $ 54.73    $ 58.22       + 2.8%
Dun & Bradstreet (NY)      25.88      35.30      40.01      + 54.6
Equifax (NY) (1)           12.85      24.15      29.90     + 132.7
Garter Group (NY)           6.90      11.69      12.90      + 87.0
Info. Holdings (NY)        23.44      28.31      28.80      + 22.9
Knight-Ridder (NY)         56.88      64.93      68.69      + 20.8
McGraw-Hill (NY)           58.63      60.98      68.25      + 16.4
Moodys (NY)                25.69      39.86      41.10      + 60.0
Penton Media (NY)          26.88       6.26       7.55      - 71.9
Primedia (NY)              11.94       4.35       3.17      - 73.5
Rogers Comm. (NY)          17.00      16.80      13.70      - 19.4
John Wiley (NY)            21.50      23.03      26.20      + 21.9
CNet (N)                   16.00       8.97       5.48      - 65.8
Info. Resources (N)         3.31       8.30       9.19     + 177.6
Scholastic (1)             44.32      50.33      54.19      + 22.3
United Bus. Media (N)      10.00       7.92       9.00      - 10.0
Value Line (N)             34.56      48.48      49.00      + 41.8
VerticalNet (N)             6.66       1.40       0.70      - 85.1
Thomson Corp. (T)          37.82      30.37      33.07      - 12.6
Reed Int. (L)              10.20       8.30       9.70       - 4.9
Reuters (L)                16.27       9.70       7.72      - 52.6
Elsevier (AM)              14.46      11.51      13.37       - 7.5
VNU (AM)                   50.77      31.18      31.68      - 37.6
Wolters Kluwer (AM)        27.53      22.62      20.89      - 24.1

Totals:                   616.12     609.47     642.48       + 4.3%

DJIA:                  11,031.05  10,021.50  10,403.94       + 5.7%

                          % Chg
Company                from 1/1/02

Dow Jones (NY)            + 6.4%
Dun & Bradstreet (NY)    + 13.3
Equifax (NY) (1)         + 23.8
Garter Group (NY)        + 10.4
Info. Holdings (NY)       + 1.7
Knight-Ridder (NY)        + 5.8
McGraw-Hill (NY)         + 11.9
Moodys (NY)               + 3.1
Penton Media (NY)        + 20.6
Primedia (NY)            - 27.1
Rogers Comm. (NY)        - 18.5
John Wiley (NY)          + 13.8
CNet (N)                 - 38.9
Info. Resources (N)      + 10.7
Scholastic (1)            + 7.7
United Bus. Media (N)    + 13.6
Value Line (N)            + 1.1
VerticalNet (N)          - 50.0
Thomson Corp. (T)         + 8.9
Reed Int. (L)            + 16.9
Reuters (L)              - 20.4
Elsevier (AM)            + 16.2
VNU (AM)                  + 1.6
Wolters Kluwer (AM)       - 7.6

Totals:                  + 5.4%

DJIA:                    + 3.8%

(1.)Prices adjusted for stock split.

NY-New York Stock Exchange

N-NASDQ

T-Toronto

L-London

AM-Amsterdam.