We re-examine the basic investment problem of deciding when to incur a sunk cost to obtain a stochastically fluctuating benefit. The optimal investment rule satisfies a trade-off between a larger versus a later net benefit; we show that this trade-off is closely analogous to the standard...

In this paper we ask whether a policy of targeted export promotion can raise domestic welfare when several oligopolistic industries all draw on the same scarce factor of production. Our point of departure is one of Cournot duopoly in which a single home firm competes with a single foreign firm...

This paper analyzes trade in manufactured goods that are produced via a vertical production structure with many stages, where some value is added at each to an intermediate product to yield a good-in-process ready for the next stage. We consider the stage at which a good is traded to be an...

This paper reviews the literature on governments' motivations for negotiating and joining international trade agreements. I discuss both normative explanations for trade agreements and explanations based on political-economy concerns. Most of the paper focuses on the purpose of multilateral...

In this paper, I survey the recent theoretical literature that incorporates heterogeneous labor into models of international trade. The models with heterogeneous labor have been used to study how talent dispersion can be a source of comparative advantage, how the opening of trade affects the...

In an economy with imperfect labor contracts, differences in the distribution of human capital are an independent source of comparative advantage. I study a world economy with two sectors, one where output is produced by teams and another where individuals can work alone. When workers' abilities...

In this paper, I develop a model of dynamic comparative advantage based on endogenous innovation. Firms in each of two countries devote resources to R&D in order to improve the quality of high-technology products. Research successes generate profit opportunities in the world market. The model...

Recently, the United States International Trade Commission conducted a Section 201 or "escape clause" hearing to determine whether imports have been the most significant cause of injury to the U.S. steel industry. This paper suggests a methodology for conducting the necessary analysis for such...

In this paper, I examine the argument that free trade may be harmful to less developed countries, because such international competition inhibits the formation of a local entrepreneurial class.I view the entrepreneur as the manager of the industrial enterprise, as well as the agent who bears the...

This paper studies the wage and employment behavior of a unionized sector that is confronted by an intensification of international competition. After developing a formal model of a monopoly union subject to majority rule, I study the response of a unionized sector operating under a seniority...