Abstract
This paper introduces product variety into the Balassa-Samuelson model in order to extend the model of real exchange rate determination. With product differentiation, real exchange rates depend not only on the relative price of nontradables to tradables but also on relative prices among tradables. This paper identifies a new factor that determines the extent of variety, termed Infrastructural Technology, and that affects real exchange rates not through the relative price of nontradables but through relative prices among tradables. This paper also conducts empirical tests, and the results of these tests support the model.
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