I study the interaction between imperfect labor contracts and international trade in a setting in which workers have private information about their own abilities. When an individual’s contribution to firm output can be measured accurately in some activities but not in others, the most able workers select occupations in which their pay most closely reflects their own performance. In a world economy with two otherwise similar countries that have different distributions of talent, the country with the more heterogeneous labor force exports the good that is produced by the most talented individuals. In this country, trade exacerbates the “polarization” of the labor force and often worsens the distribution of income.

We study the determinants of the location of subcontracted activity in a general equilibrium model of outsourcing and trade. We model outsourcing as an activity that requires search for a partner and relationship-specific investments that are governed by incomplete contracts. The extent of international outsourcing depends inter alia on the thickness of the domestic and foreign market for input suppliers, the relative cost of searching in each market, the relative cost of customizing inputs and the nature of the contracting environment in each country.

We develop a model of repeated product improvements in a continuum of sectors. Each product follows a stochastic progression up a quality ladder.

We develop a two-country model of endogenous innovation and imitation in order to study the interactions between these two processes. Firms in the North race to bring out the next generation of a set of technology-intensive products. Each product potentially can be improved a countably infinite number of times, but quality improvements require the investment of resources and entail uncertain prospects of success. In the South entrepreneurs invest resources in order to learn the production processes that have been developed in the North. All R&D investment decisions are made by forward-looking, profit-maximizing entrepreneurs. The steady-state equilibrium is characterized by constant aggregate rates of innovation and imitation. We study how these rates respond to changes in the sizes of the two regions and to policies in each region to promote learning.

In this paper we provide an integrative treatment of the welfare effects of trade and industrial policy under oligopoly, and characterize qualitatively the form that optimal intervention takes under a variety of assumptions about the number of firms, their conjectures about the response of their rivals to their actions, the substitutability of their productsand the markets in which they are sold. We find that when no domestic consumption occurs optimal policy under duopoly with a single home firm depends on the difference between firms' actual responses to their rivals and the response that their rivals' conjecture. If conjectures are consistent , free trade is optimal. A tax or subsidy is indicated depending on the sign of the difference between the conjectured and the actual reponse.With more than one home firm but still no domestic consumption, an export tax is indicated if conjectures are consistent. Production subsidies and export tax-cum-subsidies can raise national welfare in the presence of domestic consumption, because these policies can mitigate the extent of the consumption distortion implicit in the deviation of price from marginal cost.

Endorsements are a simple language for communication between interest-group leaders and group members. The members, who share policy concerns, may not perfectly understand where their interests lie on certain issues. If their leaders cannot fully explain the issues, they can convey some information by endorsing a candidate or party. When interest groups endorse legislative contenders, the candidates may compete for backing. Policies may favor special interests at the expense of the general public. We examine the conditions under which parties compete for endorsements, the extent to which policy outcomes are skewed, and the normative properties of the political equilibria.

Whether governments clash in trade disputes or negotiate over trade agreements, their actions in the international arena reflect political conditions back home. Previous studies of cooperative and noncooperative trade relations have focused on governments that are immune from political pressures and that act as benevolent servants of the public interest. Here we take a first step toward introducing domestic politics into the analysis of international economic relations. We study the interactions between national leaders who are concerned both with providing a high standard of living to the general electorate and collecting campaign contributions from special interest groups. The analysis reveals the determinants of the structure of protection in a noncooperative trade war and in a cooperative trade agreement.

The authors develop a multicountry, dynamic general equilibrium model of product innovation and international trade to study the creation of comparative advantage through R$50D and the evolution of world trade over time. In their model, firms must incur resource costs to introduce new products, and forward-looking potential producers conduct R$50D and enter the product market whenever profit opportunities exist. Trade has both intraindustry and interindustry components, and the different incentives that face agents in different countries for investment and savings decisions give rise to intertemporal trade. The authors derive results on the dynamics of trade patterns and trade volume and on the temporal emergence of multinational corporations.

We propose a theory of task trade between countries that have similar relative factor endowments and technological capabilities, but may differ in size. Firms produce differentiated goods by performing a continuum of tasks, each of which generates local spillovers. Tasks can be performed at home or abroad, but offshoring entails costs that vary by task. In equilibrium, the tasks with the highest offshoring costs may not be traded. Among the remainder, those with the relatively higher offshoring costs are performed in the country that has the higher wage and the higher aggregate output. We discuss the relationship between equilibrium wages, equilibrium outputs, and relative country size.

Accepted Manuscript