Avinash Dixit and Joseph Stiglitz revolutionized the modelling of imperfectly competitive markets and launched "the second monopolistic competition revolution". Experts in the areas of macroeconomics, international trade theory, economic geography, and international growth theory examine the success of the second revolution in this collection of papers. They reveal what appears to be "missing" and look forward to the next step in the modelling of imperfectly competitive markets. The text includes a comprehensive survey of the two monopolistic competition revolutions, and previously unpublished working papers by Dixit and Stiglitz that led to their famous 1977 paper.
In 1977 Dixit and Stiglitz revolutionized the modeling of imperfectly competitive markets, launching the second monopolistic competition revolution. This 2003 text includes a comprehensive survey of both monopolistic competition revolutions, and previously unpublished working papers by Dixit and Stiglitz that led to their famous 1977 paper.
The most important book on antitrust ever written. It shows how antitrust suits adversely affect the consumer by encouraging a costly form of protection for inefficient and uncompetitive small businesses.
This up-to-date synthesis of the basic tools and survey results in international trade theory is unique in giving factor mobility equal billing with goods trade, highlighting factor flows in the context of a mainstream approach to trade theory. The importance of the international flow of factors has grown in recent decades, primarily because of increasing returns, imperfect competition, multinational corporations, and labor migration; theories of factor mobility and trade in goods can no longer be lumped together. Using sophisticated techniques, as well as simple economic intuitions and easy-to-follow diagrams, Kar-yiu Wong systematically presents within unified frameworks all the basic analytical techniques involved in the theories of international trade and factor mobility. Wong also provides extensive coverage of such issues as interactions between international trade in goods and capital movement, external economies of scale, monopolistic competition and differentiated products, oligopoly, welfare economics of international trade, and policy analysis for various models, and he devotes two separate chapters to multinational corporations and international labor migration. New techniques and approaches to these issues are suggested, and new results obtained for many of them. For instance, the discussion of intra-industry trade in the presence of positive transport cost and arbitrage is new, as is the systematic examination of the relationship between international trade in goods and factor mobility with external economies of scale, monopolistic competition, and oligopoly. Of particular importance to trade theorists, these issues serve as the link between neoclassical and imperfect-competition models.
This paper studies the macroeconomic effect and underlying firm-level transmission channels of a reduction in business entry costs. We provide novel evidence on the response of firms' entry, exit, and employment decisions. To do so, we use as a natural experiment a reform in Portugal that reduced entry time and costs. Using the staggered implementation of the policy across the Portuguese municipalities, we find that the reform increased local entry and employment by, respectively, 25% and 4.8% per year in its first four years of implementation. Moreover, around 60% of the increase in employment came from incumbent firms expanding their size, with most of the rise occurring among the most productive firms. Standard models of firm dynamics, which assume a constant elasticity of substitution, are inconsistent with the expansionary and heterogeneous response across incumbent firms. We show that in a model with heterogeneous firms and variable markups the most productive firms face a lower demand elasticity and expand their employment in response to increased entry.
Market Structure and Foreign Trade presents a coherent theory of trade in the presence of market structures other than perfect competition. The theory it develops explains trade patterns, especially of industrial countries, and provides an integration between trade and the role of multinational enterprises. Relating current theoretical work to the main body of trade theory, Helpman and Krugman review and restate known results and also offer entirely new material on contestable markets, oligopolies, welfare, and multinational corporations, and new insights on external economies, intermediate inputs, and trade composition.
