The Diffusion of Scientific Knowledge across Time and Space: Evidence from Professional Transitions for the Superstars of Medicine

Pierre Azoulay, Joshua S. Graff Zivin, and Bhaven N. Sampat, The Rate and Direction of Inventive Activity Revisited (University of Chicago Press, 2011), chap. 2, https://www.nber.org/books-and-chapters/rate-and-direction-inventive-activity-revisited/diffusion-scientific-knowledge-across-time-and-space-evidence-professional-transitions-superstars.