Exhibit 1
JOINT FILING AGREEMENT
The undersigned hereby agree that this statement on Schedule 13D dated
December 31, 1999 with respect to the Common Stock of NetRatings, Inc. is, and
any amendments hereto signed by each of the undersigned shall be, filed on
behalf of each of us pursuant to and in accordance with the provisions of Rule
13(d)-1(f) under the Securities Exchange Act of 1934, as amended.
Dated: December 31, 1999
XXXXXXX MEDIA RESEARCH, INC.
By: /s/ Xxxx X. Xxxxxxx
-------------------------------
Name: Xxxx X. Xxxxxxx
Title: President and
Chief Executive Officer
VNU N.V.
By: /s/ Xxxxxx X. Xxxxx
-------------------------------
Name: Xxxxxx X. Xxxxx
Title: Director
Page 16
