ECONOMIES OF SCALE AND THE SIZE OF EXPORTERS
研究发现企业规模不能成为出口状态的主要决定因素，需要独立于规模的变量来解释出口商的数量和规模，且贸易自由化调整主要通过集约边际，生产率提升减半。
How important are economies of scale in exporting? We argue that firm size cannot be the main determinant of export status if a model is to be consistent with the observed number and size of exporters. Instead, we need a lot of variation independent of firm size to reconcile the model with the data. We show that the augmented model also has markedly different implications regarding the margin of adjustment in the event of a trade liberalization: most of the adjustment is through the intensive margin and productivity gains due to reallocation are halved.