Retailer Leadership under Monopolistic Competition.

We investigate a modification of the Dixit–Stiglitz model supplemented by retailing; namely, we consider various situations of Stackelberg equilibrium under retailer leadership and the condition of free entry of manufacturers to the market. For each of the situations, we provide detailed solutions considered taking into account the preferences of participants in the market interaction. This allows one to understand which of the considered situations are most beneficial to occur for retailer, manufacturers, and for society as a whole. Moreover, optimal taxation is considered. Situations are revealed when it is beneficial for the state to tax and when, on the contrary, to subsidize the producer. [ABSTRACT FROM AUTHOR]