oligopoly without the unrealistic restrictions typically imposed for tractability and to demonstrate that the fundamental …

prices and advertising tariffs. We build on the work of Gabszewicz, Laussel and Sonnac (2001, 2002), whose model we take as …), cover prices are positive and the minimal differentiation outcome does not depend on the size of the advertising market. We … to cooperate in setting cover prices and advertising tariffs but not the editorial line …