Disregarding the Shoulders of Giants: Inferences from Innovation Research
研究发现，近期提出的创新决定因素中只有少数对专利和引用有实质独立信息，且常用计量方法无法替代对已知因素的考虑，为研究者提供了选择控制变量的框架。
Abstract Studies proposing new determinants of corporate innovation include previously identified factors in an ad hoc manner. We find that only a sparse set of recently proposed innovation determinants provide material, independent information about patents and citations. We document that inferences in recent empirical studies often change when we include previously discovered innovation determinants. Commonly used econometric methods, including fixed effects and plausible shocks, do not always mitigate the need to condition on previously identified innovation determinants. Rather than randomly selecting a subset of control variables from prior studies, our analysis offers researchers a framework to consider previously proposed variables.. Authors have furnished an Internet Appendix, which is available on the Oxford University Press Web site next to the link to the final published paper online.