Ideological Segregation Online and Offline

This paper would not have been possible without the generous support of Jim Collins at Mediamark Research and Intelligence. We thank our dedicated research assistants for invaluable contributions to this project, and seminar participants at Chicago Booth and the SIEPR / Microsoft Conference on Internet Economics for helpful comments. This research was funded by the Initiative on Global Markets, the George J. Stigler Center for the Study of the Economy and the State, the Centel Foundation / Robert P. Reuss Faculty Research Fund, and the Neubauer Family Foundation, all at the University of Chicago Booth School of Business. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

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