Comparison of stock prices for selected trade and business information companies, 3/31/04-12/31/04-3/31/05.

COMPARISON OF STOCK PRICES FOR SELECTED TRADE AND BUSINESS
INFORMATION COMPANIES, 3/31/04-12/31/04-3/31/05

                        Price on        Price on       % Change
Company                  3/31/04         3/31/05   from 3/31/04

Dow Jones (NY)            $47.91          $37.37       -22.0%
Dun & Bradstreet (NY)      53.50           61.45       +14.9
Equifax (NY)               25.82           30.69       +18.9
Gartner (NY)               11.65            9.57       -17.9
Knight-Ridder (NY)         73.25           67.25        -8.2
McGraw-Hill (NY)           76.14           87.25       +14.6
Moody's (NY)               70.80           80.86       +14.2
Pearson (NY)               11.50           12.26        +6.6
Primedia (NY)               2.70            4.35       +61.1
Reed (NY)                  35.50           41.62       +17.2
Rogers (NY)                18.69           27.24       +45.7
John Wiley (NY)            29.93           35.25       +17.8
CNET (N)                   10.34            9.44        -8.7
Reuters (N)                42.75           46.10        +7.8
Scholastic (N)             27.25           36.89       +35.4
United Bus. (N)             9.00           10.20       +13.3
Value Line (1) (N)         52.73           39.00       -26.0
Thomson (T)                30.86           33.35        +8.1
Elsevier (AM)              13.02           15.20       +16.7
VNU (AM)                   28.25           29.40        +4.1
Wolters Kluwer (AM)        16.86           18.41        +9.2
Penton Media (OTCS)         0.72            0.17       -76.4

Totals:                   710.88          753.24        +5.96%
DJIA:                   10357.70        10503.76        +1.41%

                        Price on        % Change
Company                 12/31/04   from 12/31/04

Dow Jones (NY)             43.06         -13.2%
Dun & Bradstreet (NY)      59.65          +3.0
Equifax (NY)               28.10          +9.2
Gartner (NY)               12.46         -23.2
Knight-Ridder (NY)         68.09          -1.2
McGraw-Hill (NY)           91.54          -4.7
Moody's (NY)               86.85          -6.9
Pearson (NY)               11.81          +3.8
Primedia (NY)               3.80         +14.5
Reed (NY)                  37.10         +12.2
Rogers (NY)                26.15          +4.2
John Wiley (NY)            34.65          +1.7
CNET (N)                   11.23         -15.9
Reuters (N)                42.95          +7.3
Scholastic (N)             36.96          -0.2
United Bus. (N)             8.75         +16.6
Value Line (1) (N)         39.35          -0.9
Thomson (T)                35.29          -5.5
Elsevier (AM)              13.30         +14.3
VNU (AM)                   28.83          +2.0
Wolters Kluwer (AM)        19.60          -6.1
Penton Media (OTCS)         0.09         +88.9

Totals:                   757.73          -0.59%
DJIA:                   10783.01          -2.59%

NY--New York Stock Exchange; N--NASDQ; T--Toronto; AM--Amsterdam.
(1)--A one-time dividend of $17.50 per share was paid at the end
of May, 2004.