PRODUCTIVITY IMPROVEMENTS AND FALLING TRADE COSTS: BOON OR BANE?*

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This article looks at two features of globalization, namely, productivity improvements and falling trade costs, and explores their effect on welfare in a monopolistic competition model with heterogenous firms and technological asymmetries. Contrary to received wisdom, and for reasons different from adverse terms of trade effects, it is shown that improvements in a partner's productivity must hurt us. Moreover, falling trade costs can raise welfare in the technologically advanced country while reducing it in the backward one, if technological asymmetries are large enough.