This paper characterizes analytically the optimal tariff of a large one-sector economy with monopolistic competition and firm heterogeneity in general equilibrium, thereby extending the small-country results of Demidova and Rodriguez-Clare (JIE, 2009) and the homogeneous firms framework of Gros...

We revisit the debate on the optimal number of firms in the commons in a differential oligopoly game in which firms are either quantity- or price-setting agents. Production exploits a natural resource and involves a negative externality. We calculate the number of firms maximizing industry...

Competition policy is a subject of heated debate. Antitrust authorities, seeking to battle anticompetitive behavior in complex cases to the best of their abilities, often find themselves advised by rival economic theories and disputed empirical analyses. As a consequence, there is a real...