Previous theoretical contributions on endogenous tariff formation have focused on trade mod-els with homogeneous goods and constant returns to scale. This paper investigates the political equilibrium of trade policy when economic structure is instead characterized by differentiated products and...

This paper explores the implications for trade policy of buyer concentration in markets for primary commodity exports of developing countries. Simple partial equilibrium models of monopsony and oligopsony show that the best available policy for the exporting country may be to tax exports so as...

The procompetitive effects of trade policies are analyzed in a foreign duopoly model of vertical product differentiation. A uniform tariff policy complying with the Most Favored Nation (MFN) clause is welfare superior to free trade because of a pure rent-extracting effect. A nonuniform tariff...

This paper focuses on the impact of technological progress (modeled as learning by doing) on economic growth when one of the inputs in production is an open access renewable resource. Technological progress is found to indi- rectly induce resource depletion, such that sustainable growth will not...

We develop a model of international trade with two dimensions of firm heterogeneity and export quality constraints that manifest as higher variable trade costs for lower quality firms. In addition to "productivity", firms are also heterogeneous in their "caliber" -- the ability to develop...

This paper uses a database covering the universe of French firms for the period 1990-2007 to provide a forensic account of the role of individual firms in generating aggregate fluctuations. We set up a simple multi-sector model of heterogeneous firms selling to multiple markets to motivate a...

Empirical studies show that tradable consumption goods are more expensive in rich countries. This paper proposes a simple yet novel explanation for this apparent failure of the law of one price: Consumers' utility from tradable goods depends on their consumption of complementary goods and...

This paper evaluates the welfare impact of observed levels of migration and remittances in both origins and destinations, using a quantitative multi-sector model of the global economy calibrated to aggregate and firm-level data on 60 developed and developing countries. Our framework accounts...

Existing estimates of power laws in firm size typically ignore the impact of international trade. Using a simple theoretical framework, we show that international trade systematically affects the distribution of firm size: the power law exponent among exporting firms should be strictly lower in...

Firm size follows Zipf's Law, a very fat-tailed distribution that implies a few large firms account for a disproportionate share of overall economic activity. This distribution of firm size is crucial for evaluating the welfare impact of macroeconomic policies such as barriers to entry or trade...