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谁从专利中获利?创新企业中的租金分享*

Who Profits from Patents? Rent-Sharing at Innovative Firms*
Quarterly Journal of Economics · 2019 · Patrick Kline、Neviana Petkova、Heidi Williams、Owen Zidar

中文摘要

本文利用新建立的美国专利申请与美国企业及工人税务记录之间的关联,分析专利引致的劳动生产率冲击如何传导至工人薪酬。我们通过比较专利申请最初获批的企业与专利申请最初被驳回的企业,推断专利申请获批的因果效应。为识别事前有价值的专利,我们基于预先确定的企业及专利申请特征,将Kogan等(2017)的股票超额收益率估计值外推至全部获批和被驳回的专利申请。事前有价值的专利申请最初获批,会带来企业生产率和工人薪酬的大幅增加。相比之下,事前价值较低的专利申请最初获批,对企业层面的结果没有可检测到的影响。专利申请获批促使企业增加就业,但入职工资和劳动力构成对专利审批决定并不敏感。平均而言,专利引致的剩余每增加1美元,工人就通过收入提高获得其中约30美分。对于自申请当年起一直在职的工人,这一份额约为上述平均份额的两倍。这些收入效应集中在男性和收入分布上半部分的工人中,并伴随着这些群体工人留任率的相应提高。我们将这些收入反应解释为资深工人获取经济租金的体现,因为创新企业替换这些工人的成本最高。

Abstract

This article analyzes how patent-induced shocks to labor productivity propagate into worker compensation using a new linkage of U.S. patent applications to U.S. business and worker tax records. We infer the causal effects of patent allowances by comparing firms whose patent applications were initially allowed to those whose patent applications were initially rejected. To identify patents that are ex ante valuable, we extrapolate the excess stock return estimates of Kogan et al. (2017) to the full set of accepted and rejected patent applications based on predetermined firm and patent application characteristics. An initial allowance of an ex ante valuable patent generates substantial increases in firm productivity and worker compensation. By contrast, initial allowances of lower ex ante value patents yield no detectable effects on firm outcomes. Patent allowances lead firms to increase employment, but entry wages and workforce composition are insensitive to patent decisions. On average, workers capture roughly 30 cents of every dollar of patent-induced surplus in higher earnings. This share is roughly twice as high among workers present since the year of application. These earnings effects are concentrated among men and workers in the top half of the earnings distribution and are paired with corresponding improvements in worker retention among these groups. We interpret these earnings responses as reflecting the capture of economic rents by senior workers, who are most costly for innovative firms to replace.
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