This chapter reviews the new approach to international trade based on firm heterogeneity in
differentiated product markets. This approach explains a variety of features exhibited in …

This article reviews the empirical evidence on firm heterogeneity in international trade. A first
wave of empirical findings from microdata on plants and firms proposed challenges for …

We develop and structurally estimate a model of heterogeneous multiproduct firms that can
be used to decompose the firm-size distribution into the contributions of …

Drawing on uncommonly rich and representative data from the Colombian manufacturing
census, this paper documents new empirical relationships between input prices, output …

If trade barriers are managed by inefficient institutions, trade liberalization can lead to
greater-than-expected gains. We examine Chinese textile and clothing exports before and …

This paper presents theory and evidence from disaggregated Chinese data that tariff
reductions induce a country's producers to upgrade the quality of their exports. We first …

Micro-level data have had a profound influence on research in international trade over the
last ten years. In many regards, this research agenda has been very successful. New …

This paper explores the impact of input trade liberalization on imported input and exported
product prices. Using Chinese transaction data for 2000–2006, we capture causal effects …

The unit values of internationally traded goods are heavily influenced by quality. We model
this in an extended monopolistic competition framework where, in addition to choosing price …

This paper documents the construction of BACI, our international trade database, which
covers more than 200 countries and 5,000 products, between 1994 and 2007. New …