Autore: Agur, Itai
Titolo: Firm Heterogeneity and the Two Sources of Gains from Trade
Periodico: European University Institute of Badia Fiesolana (Fi). Department of Economics - Working papers
Anno: 2006 - Fascicolo: 38 - Pagina iniziale: 1 - Pagina finale: 20

Recent empirical work identies two main channels through which consumers benefit from trade. Trade liberalization lowers prices, while it raises product variety. This paper develops the first model that connects both channels and interprets their interaction. It shows that heterogeneity in firm productivity is the source behind both. Upon liberalization efficient exporters enter, pushing out the least efficient domestic firms. Two countervailing forces emerge, both stylized facts. Liberalization leaves a more concentrated market. But exporters offer more variety than the firms that they replace. Remarkably, total variety unambiguously increases. Exploration of comparative statics leads to an intuitive explanation.


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