Balsmeier, Benjamin, Lee Fleming, and Sonja Lück. “Isolating Personal Knowledge Spillovers: Coinventor Deaths and Spatial Citation Differentials.”https://doi.org/10.1257/aeri.20210275__American Economic Review: Insights 5, no. 1 (2023): 21–33.https://doi.org/10.1257/aeri.20210275 .