Internet Appendix for : 'Anticompetitive Effects of Common Ownership'

This internet appendix complements the paper "Anticompetitive Effects of Common Ownership" and is organized as follows: Section I outlines a model of competition under common ownership that yields the network density measure of common ownership concentration we use in the empirical analysis. The data appendix in section II provides details on data set construction and variable definitions. Section III contains robustness checks and provides additional results described in the main paper