Скрининг в модели монополистической конкуренции для многопродуктовых фирм
A model of monopolistic competition for a closed economy, consisting of the traditional sector and the industrial production sector, which includes multi-product companies, is built. The consumption sector consists of heterogeneous consumers with a two-level Cobb-Douglas utility function and a generalized CES utility function built into it. The generalized CES utility function, unlike the standard one, includes, besides the love of variety, also the love of product quality, which makes it possible to distinguish consumers with a different attitude to product quality. The industrial sector consists of firms producing a variety of differentiated products of different quality, oriented to a specific type of customer. In the work, the demand functions of heterogeneous consumers for goods of different quality are obtained, the state of short-term equilibrium is considered for the case when firms have market power in choosing the quality of products. Various strategies of firms with respect to the selection of the optimal combination “price-quality” of a product that provides them with the maximum profit were analyzed, and conditions were obtained for screening in conditions of incomplete information on the type of consumers.