Raphael Thomadsen Columbia University, Graduate School of Business   3022 Broadway, Uris 613 New York, NY 10027 USA   rct27@columbia.edu   http://www-1.gsb.columbia.edu/faculty/rthomadsen/       Primary Research Focus: Geographic competition between firms.   JEL Areas: L1 : Market Structure, Firm Strategy, and Market Performance: General C7 : Game Theory and Bargaining Theory:General