Income distribution and unequal gains from trade

This paper studies welfare gains from trade in a tractable model with a nonhomothetic preference over product quality. We show that the welfare changes due to trade shocks are unequal across consumers and derive a parsimonious formula to measure these welfare changes as in Arkolakis et al. (2012, American Economic Review, 102, 94-130). We find that the welfare changes are larger for consumers with lower income. Moreover, this paper shows that the welfare implications are different between a change in (iceberg-type) variable trade cost and a change in tariff when tariff revenue matters. More importantly, we show that the difference varies across consumers with different income levels.