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...

This paper proposes a new channel through which international trade affects macroeconomic volatility. We study a multi-country model with heterogeneous firms that are subject to idiosyncratic firm-specific shocks. When the distribution of firm size follows a power law with exponent sufficiently...

Why would migrant workers in rich countries ever return to poorer countries of origin? In a model of migration and household investment, with borrowing constraints and minimum investment thresholds, return migration occurs for either target-earnings or life-cycle reasons. This paper exploits a...

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...

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...