Using firm‐level data from 139 countries, this paper investigates the effect of competition in both the domestic and foreign markets on firm productivity and export decisions. Applying a sample selection endogenous treatment (SSET) Poisson model that tackles both the issue of endogenous sample selection and endogenous treatment at the same time, we document robust evidence that strong competition in the domestic market propels firms to be more productive, and decreasing domestic competition increases firms’ propensity to export. However, firms’ export intensity (i.e. how much they export) is not directly influenced by competition in the domestic market. Moreover, lower competition in the foreign market increases the propensity of domestic firms to export, enlarging the set of exporting firms to include firms with relatively smaller export amounts.

中文翻译：

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扩大影响力：竞争对企业生产率和出口决策的影响

本文使用来自139个国家的公司级数据，研究了国内外市场竞争对公司生产率和出口决策的影响。应用同时解决内生样本选择和内生处理问题的样本选择内生处理（SSET）泊松模型，我们记录了有力的证据表明，国内市场的激烈竞争促使企业提高生产率，并减少国内竞争增加了企业的出口倾向。但是，企业的出口强度（即出口量）不受国内市场竞争的直接影响。此外，国外市场竞争的加剧增加了国内公司出口的倾向，扩大了出口公司的数量，使其包括了出口量相对较小的公司。