Institution: | Haas School of Business, University of California, Berkeley, CA 94720–1900 USA.email: borenste@haas.berkeley.edu;, Department of Economics, University of California, Berkeley, CA 94720–3880, USA.email: farrell@econ.berkeley.edu;, Graduate School of International Economics and Finance, Brandeis University, Sachar International Center, Mailstop 021, Waltham, MA 02254–9110, USA and NBER.email: ajaffe@nber.org |