Multi‐Product Exporters: Product Churning, Uncertainty and Export Discoveries

Abstract

Recent research on international trade focuses on firm‐product‐level heterogeneity and the role of uncertainty in shaping international trade. This article contributes to the literature by examining product‐level dynamics within firms in the context of Mexican trade integration under NAFTA. The data show intense product churning within firms and confirm the existence of within‐firm product heterogeneity. The data indicate that new exporters enter foreign markets with a small number of varieties, most of which were previously sold at home, and with a small export small volume. The data also suggest that export discoveries are relatively rare and are imitated within a short period of time.

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