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...

The comparative advantage of many cities is based on their efficiency in the production of 'functions', e.g., business services such as finance, law, engineering, or similar functions that are used by firms in a wide range of sectors. Firms that use these functions may choose to source them...

Applied general-equilibrium (AGE) models have often made compromises to circumvent difficult modeling problems. One of these is avoiding endogenous zeros, ruling out important questions. Traditional perfect competition models: when do technologies or trade links switch from active to inactive or...

Trade theory consists of a portfolio of models. What elements might be useful in modeling the offshoring of white-collar services, or do these issues call for an entirely fresh approach? I try to identifying some of the important aspects of this phenomenon and then argue that modeling could...

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...

The institution and enforcement of property rights and contracts have been an important policy issue for the developing countries, the transition economies, and the developed countries in the 1990s. This has led to the development of a literature on technology transfer and how property rights...

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...