Ottaviano, G.I.P.; Thisse, J.-F. - Center for Operations Research and Econometrics (CORE), … - 1999
This paper tackles the issue of optimum product diversity in an imperfectly competitive market with small of large firms. First, it develops a quadratic utility model of monopolistic competition with horizontal product differentiation which avoids some of the main pitfalls of the S-D-S approach....