Patent Citations and Stock Performance: Constructing a Dynamic Industry Classification
Gay, Sebastien and Karger, Ezra, Patent Citations and Stock Performance: Constructing a Dynamic Industry Classification (September 15, 2014). Available for download at SSRN: http://ssrn.com/abstract=2496414 “Researchers in academia and the private sector use industry classifications to compare growth across and between industries, to construct industry indices, and to control for industry-level correlations of stocks over time. But …