Kotler's well-known dynamic competitive simulation model is investigated by means of analytical methods. Unlike the simulation studies run by Kotler the analytical investigation reveals (1) that the model produces changes in price elasticity over time, which do not appear economically plausible,...

The goal of the present paper is to investigate the influence of advertising on the diffusion of new telephones in West Germany. Several alternative ways of integrating advertising into the well-known Bass-diffusion-model are suggested and empirically tested. The econometric investigation yields...