We study the impact of foreign market entry and exit by firms on the trajectory of U.S. exports during and after the Great Recession. Using confidential microdata from the U.S. Census Bureau, we find that incumbent exporters were primarily responsible for the changes in aggregate foreign sales during these years. While there was a substantial decline in the number of firms that sold abroad in the midst of the crisis, new exporters during the recovery compensated for this by having larger foreign sales. Thus, while changes in foreign market participation drove substantial shifts in the variety of U.S. goods that were exported, overall they were less important for the trajectory of total foreign sales over time.

中文翻译：

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经济大萧条和缺少一代出口商

我们研究了大萧条期间和之后公司进入和退出国外市场对美国出口轨迹的影响。使用美国人口普查局提供的机密微观数据，我们发现，这些年来，现有的出口商对外国总销售额的变化负有主要责任。在危机期间，在国外销售的公司数量大幅下降，但在复苏期间，新的出口商通过增加海外销售量来弥补这一损失。因此，尽管外国市场参与度的变化使出口的美国商品种类发生了重大变化，但总体而言，它们对外国总销售额随时间的推移并不那么重要。