US7979544 Patents
Taking a size and demographic composition of a target popu lation; identifying a group of participants; determining demo graphic information for each member of the group; receiving clickstream data that connotes Internet activity of individual members of the group; producing an estimate of the target population’s Internet activity by scaling the data for each member of the group to the relative size and demographic composition of the target population and the group by apply ing a weight to the clickstream data in view of the demo graphic information; and refining the estimate of the popula tio
19 claims. 113,800 characters of text.