GAINS FROM TRADE WITH VARIABLE TRADE ELASTICITIES
研究了多部门经济中非位似偏好下的贸易收益，发现贸易弹性随国家和贸易成本水平变化，且从自给自足到实际贸易的收益比恒定弹性模型平均高出24%至28%。
Abstract We measure gains from trade in multisector economies with nonhomothetic preferences where changes in trade costs generate reallocation of expenditure across sectors. We show how to measure the trade elasticity and how it relates to welfare. In this environment, the trade elasticity now varies both across countries and with levels of trade costs. In an application, we find that the trade elasticity varies substantially across countries and that the gains from moving from autarky to observed trade are on average between 24% and 28% greater than in a model where the trade elasticity is constant.