Introduction to Mathematical Models in Market and Opinion Research

In the introduction to his book Dr. Harder has very clearly described its purpose and organization. I only want to add for the English-speaking reader a few words on the place the present text is likely to have in the cur­ rent literature. At first Dr. Harder''s undertaking might come as a surprise. Only a few years ago, Zeisel''s Say it with Figures gave the market research practi­ tioner some id...