Through an inventor survey, we find substantial error in tracking mobility of engineers and scientists by patents. These errors cause misclassification of mobility -- false positives (wrongly recording change of employer), and false negatives (failing to record change of employer). Errors are...

Through an inventor survey, we find substantial error in patent-based career histories of engineers and scientists due to contract R&D, mergers and acquisitions, and organization policy and name change. By contrast, online career profiles provide more accurate histories. Patent histories cause...

This paper studies how the COVID-19 pandemic has affected labor demand using over 100 million posted jobs on one of the largest online platforms in China. Our data reveals that, due to the effects of the pandemic both in China and abroad, the number of newly posted jobs within the first 13 weeks...