Equilibria and optima generally differ in imperfectly competitive markets. While this is well understood theoretically, it is unclear how large the welfare distortions are in the aggregate economy. Do they matter quantitatively? To answer this question, we develop a multi-sector monopolistic...

In a free-entry Cournot oligopoly model with a quadratic utility function that yields differentiated products, it is shown that there are losses from trade when the trade cost is close to the prohibitive level. Although the total number of varieties increases, there is a reduction in consumer...

This paper develops a two-tier oligopoly model in which the entry of a multinational firm results in technology transfer to its local suppliers and also impacts the degree of backward linkages in the local industry. The model endogenizes the multinational's choice between anonymous market...

We develop a model with endogeneity in key features of industrial structure linked to heterogeneous cost structures under Cournot competition. We use the model to explore issues related to cross-country differences in industry structure and the impact of globalization on markups and pricing,...

This paper develops a two-tier oligopoly model in which the entry of a multinational firm results in technology transfer to its local suppliers and also impacts the degree of backward linkages in the local industry. The model endogenizes the multinational's choice between anonymous market...

Standard international trade lectures normally comprises three central theories: the Ricardian Model, the Heckscher-Ohlin-Samuelson Modell and New Trade Theory `a la Krugman 1979 and 1980. Nowadays this trilogy needs to be enhanced with the basic concepts of a new class of trade models: the New...

We develop a model with endogeneity in key features of industrial structure linked to heterogeneous cost structures under Cournot competition. We use the model to explore issues related to cross-country differences in industry structure and the impact of globalization on markups and pricing,...

We show the welfare effects of international trade cost reduction under endogenous domestic market structure. If the domestic labour market is competitive, there is no integer constraint and the trade cost represents transportation cost, a reduction in the transportation cost does not affect...

In a model of vertical product differentiation, duopolistic firms face quality-dependent costs and compete in quality and price in two segmented markets. Minimum quality standards, set uniformly or according to the principle of Mutual Recognition, can be used to increase welfare. The analysis...