Patenting activity or innovative originality?

We re‐examine the cross‐sectional stock return predictability of innovative originality documented in the 2018 paper by Hirshleifer et al. and introduce two measures of patenting activity: patent existence and patent counts. As firms with zero patents have zero innovative originality, we conjecture and find a high correlation between patenting activity measures and innovative originality. The findings of Hirshleifer et al. do not hold when we control for patenting activity. Our results highlight that simple patenting activity measures capture a significant portion of innovative originality, and hence need to be adequately controlled for in future innovation studies. [ABSTRACT FROM AUTHOR]