← ireadpaper · 顶刊中的公共政策研究

评《贸易引致的技术变革:中国进口对创新、IT与生产率的影响》

On “Trade Induced Technical Change: The Impact of Chinese Imports on Innovation, IT, and Productivity”
Review of Economic Studies · 2021 · Douglas L. Campbell、Karsten Mau

中文摘要

Bloom 等(2016)发现,中国进口竞争引致了专利、IT 采用和全要素生产率(TFP)的上升,增幅最高可达 20 世纪 90 年代末和 21 世纪初欧洲总增量的 30%。我们在其专利结果的一项重要稳健性检验中发现了若干编码错误。修正后,我们发现中国竞争与专利之间不存在统计显著的关系。原论文中的其他设定使用了有问题的 $ \log(1+\rm patents) $ 变换。鉴于中国竞争部门中企业的平均专利数较低,且全样本中专利数迅速下降,这种标准化会引致偏误。

Abstract

Abstract Bloom et al. (2016) find that Chinese import competition induced a rise in patenting, IT adoption, and total factor productivity (TFP) by up to 30% of the total increase in Europe in the late 1990s and early 2000s. We uncover several coding errors in an important robustness check of their patent results. When corrected, we find no statistically significant relationship between Chinese competition and patents. Other specifications in the original paper use a problematic $ \log(1+\rm patents) $ transformation. This normalization induces bias given low average patent counts for firms in China-competing sectors and rapidly declining patents across the sample.
在 ireadpaper 查看全部 →