COMPARISON OF STOCK PRICES FOR SELECTED TRADE AND BUSINESS INFORMAIION COMPANIES, 12/31/00-8/31/01-9/17/01.

COMPARISON OF STOCK PRICES FOR SELECTED TRADE AND BUSINESS
INFORMAIION COMPANIES, 12/31/00-8/31/01-9/17/01


                                                        % Chg Thru
Company                     12/31/00  8/31/01  9/17/01     8/31/01

Dow Jones (NY)               $ 57.75  $ 54.88    49.00      -  5.0%
Dun & Bradstreet (NY)          26.44    33.36    29.23      + 26.2
Equifax (NY)                   29.06    26.03    22.40      - 10.4
Gartner Group (NY)              7.84     9.95     9.30      + 26.9
Information Holdings (NY)      26.06    21.53    18.74      - 17.4
Knight-Ridder (NY)             58.44    60.60    57.26      +  3.7
McGraw-Hill (NY)               60.56    59.25    53.77      -  2.2
Moody's (NY)                   28.00    34.39    33.75      + 22.8
Penton Media (NY)              25.56    12.60     8.60      - 50.7
Primedia (NY)                  11.94     4.85     4.95      - 59.4
John Wiley & Sons (NY)         19.50    20.15    20.30      +  3.3
CNET (NQ)                      14.63     9.18     7.33      - 37.3
Hungry Minds (NQ)               5.75     6.06     6.08      +  5.4
Information Resources (NQ)      3.69     7.35     7.00      + 99.2
Scholastic [1] (NQ)            43.81    38.93    38.50      - 11.1
United Business Media (NQ)     10.00     7.90     7.16      - 21.0
Value Line (NQ)                35.00    44.00    46.01      + 25.7
VerticalNet (NQ)                6.00     0.90     0.53      - 85.0
Thomson Corp. (T)              37.19    30.87    29.38      - 17.0
Torstar (T)                    13.02    12.25    11.47      -  5.9
Reed Int. (L)                   9.22     8.80     7.50      -  4.6
Reuters (L)                    15.61    11.10     8.94      - 28.9
Elsevier (AM)                  13.25    14.71    10.62      + 11.0
VNU (AM)                       51.58    32.02    27.26      - 37.9
Wolters Kluwer (AM)            26.35    20.49    20.71      - 22.2
TBPI Totals:                  636.25   582.15   535.79      -  8.5%
DJIA Totals:                10652.66  9949.75  8920.70      -  6.6%




                            % Chg Thru
Company                        9/17/01

Dow Jones (NY)                  - 15.2%
Dun & Bradstreet (NY)           + 10.6
Equifax (NY)                    - 22.9
Gartner Group (NY)              + 18.6
Information Holdings (NY)       - 28.1
Knight-Ridder (NY)              -  2.0
McGraw-Hill (NY)                - 11.2
Moody's (NY)                    + 20.5
Penton Media (NY)               - 66.4
Primedia (NY)                   - 58.5
John Wiley & Sons (NY)          +  4.1
CNET (NQ)                       - 49.9
Hungry Minds (NQ)               +  5.7
Information Resources (NQ)      + 89.7
Scholastic [1] (NQ)             - 12.1
United Business Media (NQ)      - 28.4
Value Line (NQ)                 + 31.5
VerticalNet (NQ)                - 91.2
Thomson Corp. (T)               - 21.0
Torstar (T)                     - 11.9
Reed Int. (L)                   - 18.7
Reuters (L)                     - 42.7
Elsevier (AM)                   - 19.8
VNU (AM)                        - 47.2
Wolters Kluwer (AM)             - 21.4
TBPI Totals:                    - 15.8%
DJIA Totals:                    - 16.3%



NY-New York;

NQ-NASDQ;

T-Toronto;

London;

AM-Amsterdam.

(1.)Adjusted for stock split.