Abstract:
In 1985 VNU was confronted with a rather sudden decline in the circulation of a large part of their magazines. As a matter of course the reaction was: try to find the reasons for this decline! In summer 1985 it was decided to start a comprehensive continuous information system with respect to the circulation of magazines. In this paper I will shortly describe the various elements of the system and some practical applications with respect to the marketing of women's weeklies.