The abstract of the paper, Measuring the Unequal Gains from Trade by Pablo D. Fajgelbaum and Amit K. Khandelwal, reads:
Individuals that consume different baskets of goods are differentially affected by relative price changes caused by international trade. We develop a methodology to measure the unequal gains from trade across consumers within countries. The approach requires data on aggregate expenditures and parameters estimated from a nonhomothetic gravity equation. We find that trade typically favors the poor, who concentrate spending in more traded sectors.So another reason for being pro international trade.