Learning How To Export
在标准质量阶梯内生增长模型中引入企业学习出口需要时间这一新假设，发现该模型能产生比传统贸易模型大得多的贸易自由化福利收益。
Abstract In this paper, we present a standard quality ladders endogenous growth model with one significant new assumption: it takes time for firms to learn how to export. It is known that the welfare gains from trade liberalization implied by a large class of models like the Armington gravity model, the Krugman model, and the Melitz model are small. Our quality ladders model is consistent with a number of firm‐level stylized facts from the heterogeneous firms trade literature and is, in addition, capable of generating very large welfare gains from trade liberalization.