On Measuring the Welfare Gains from Trade Under Consumer Heterogeneity
构建多国多行业贸易模型，纳入非位似偏好异质性消费者，发现代表性消费者假设会高估穷人福利收益最多5个百分点、低估富人最多11个百分点，且关税收入损失对部分消费者不可忽略。
I develop a multi‐country, multi‐industry model of trade that features heterogeneous consumers with non‐homothetic preferences. I use the model to quantify the measurement errors in the welfare gains estimates caused by the assumption of a representative consumer (ARC). First, I reduce the world level of all trade costs by 15% and find that ARC overestimates (underestimates) the gains of the poor (rich) by up to 5 (11) percentage points. Second, I eliminate import tariffs around the globe and show that the loss of tariff revenues is not negligible for some consumers and that the measurement errors from ARC are between −15 and 4% points.