International trade economists made seminal contributions to general equilibrium theory, moving away from an emphasis on existence of equilibrium to algebraic formulations which enabled us to characterize key relationships between parameters and variables, such as that between tariffs and...

The basic gains-from-trade theorem makes a stark comparison between completely free trade and complete autarky. This paper is motivated by recent evidence that trade has greatly expanded on the extensive margin (aka fragmentation, offshoring) by adding newly traded goods and services and that...

A major role for per-capita income in international trade, as opposed to simply country size, was persuasively advanced by Linder (1961). Yet this crucial element of Linder's story was abandon by most later trade economists in favor of the analytically-tractable but counter-empirical assumption...

Despite several theoretical contributions and considerable informal empirical evidence" to the contrary, a notion that trade and investment are substitutes persists in trade policy" analysis. This paper considers the liberalization of commodity trade versus liberalization" allowing direct...

The US-Mexico free-trade debate included some theoretical assertions that were then used as arguments against trade and investment liberalization. (1) Trade liberalization increases the degree to which production is internationally relocated in response to environmental restrictions...

A two-sector, two-period trade model is developed in which one sector has increasing returns based on the creation of specialized intermediate inputs. One of the two (otherwise identical) countries is not able to enter the increasing returns sector in the first period through some "accident of...

International trade policy analysis has tended to focus on the production side of general equilibrium, with policies such as a tariff or carbon tax affecting international and internal income distributions through a Heckscher-Ohlin nexus of factor intensities and factor endowments. Here I move...

The incorporation of increasing returns and imperfect competition into applied general-equilibrium (AGE) models, beginning with Harris (1984), led to much larger welfare effects from changes such as trade liberalization. But the imperfect competition side of these IO developments has often...

Producer services such as managerial and engineering consulting can provide domestic firms with the substantial benefits of specialized knowledge that would be costly in terms of both time and money for domestic firms to develop on their own. These intermediate services are often non-traded, or...

Recent theoretical developments have incorporated endogenous multinational firms into the general-equilibrium model of trade. One simple taxonomy separates the theory into vertical' models in which firms geographically separate activities by stages of production and horizontal' models of...