The Effect of High-Tech Clusters on the Productivity of Top Inventors: Comment
成果类型：
Article
署名作者：
Wiebe, Michael
刊物名称：
AMERICAN ECONOMIC REVIEW
ISSN/ISSBN：
0002-8282; 1944-7981
DOI：
10.1257/aer.20231415
发表日期：
2026-07
页码：
2754-2763
关键词：
摘要：
Moretti ( (2021 (2021) reports a positive elasticity between technology cluster size and patenting, and uses an event study and instrumental variables regressions to justify a causal interpretation. The event study does not use the variation generated by inventors moving across cities, and the instrument is constructed incorrectly due to a coding error. I run a corrected event study and fix the coding error, and find null effects. The reported elasticity may not be causal.
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