Sumit Sarkar CESP / SSS / JNU New Delhi   C/o Prof. Krishnendu Ghosh Dastidar CESP / SSS-II / JNU New Delhi 110067 New Delhi, India   ssarkar_jnu@yahoo.com     Biographical Sketch: I just completed my Ph.D. from CESP, SSS, JNU. Presently I am teaching at a business school Institute of Technology & Management, Gurgaon, India. I am also associated with CESP and continue to use its infrastructure to pursue my research.   Primary Research Focus: Industrial Organisation Theory, Network Externality, Law and Economics, Applied game theory   JEL Areas: L0 : Industrial Organization: General D0 : Microeconomics: General