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Abstract:

cover
CEP Discussion Paper
Aggregating from Micro to Macro Patterns of Trade
Stephen J. Redding and David E. Weinstein
November 2017
Paper No' CEPDP1513:
Full Paper (pdf)

JEL Classification: F11; F12; F14


Tags: comparative advantage; trade; prices; quality; variety

We develop a new framework for aggregating from micro to macro patterns of trade. We derive price indexes that determine comparative advantage across countries and sectors and the aggregate cost of living. If firms and products are imperfect substitutes, we show that these price indexes depend on variety, average demand/quality and the dispersion of demand/quality-adjusted prices, and are only weakly related to standard empirical measures of average prices, thereby providing insight for elasticity puzzles. Of the cross-section (time-series) variation in comparative advantage, 50 (90) percent is accounted for by variety and average demand/quality, with average prices contributing less than 10 percent.