Do Firms Learn from International Trade?
用专利引用衡量外国技术对法国企业专利的影响，发现进口商比非进口商更易受外国技术影响，且开始进口后引用增加，但出口与外国专利引用无显著关联。
Using patent citations as a proxy for the influence of foreign technology on French firms' patents, this paper finds that the inventions of importers are significantly more likely to be influenced by foreign technology than are the inventions of firms that do not import. Furthermore, importers' citations increase relative to similar firms after they start importing. Exporting, in contrast, is not significantly associated with citations to foreign patents. These results persist after controlling for foreign ownership linkages and joint ventures and alliances, and after correcting for selection bias using propensity-score matching. © 2006 The President and Fellows of Harvard College and the Massachusetts Institute of Technology.