Saptarshi Mukherjee Indian Statistical Institute,Delhi   7,S.J.S. Sansanwal Marg,New Delhi-110016 Delhi, 110016 India   saptar3r@isid.ac.in   http://www.isid.ac.in   Biographical Sketch: Pursuing Ph.D(Quantitative Econ.)-2003.... {Indian Statistical Institute,New Delhi,India.} M.A.(Econ.)-2003 {Kalyani University.) B.A.(Econ. Hons)-2001 {Kalyani University.) Currently engaged in research on: (i) Aggregation problem over diffrent subgroups in a voting problem. (ii)Self-selectivity(consistency) of social choice functions and impossibility theorems. (iii)Bertrand competition in a two stage game framework when Chamberlinian sharing rule is applied. Supervisor: Dr.Arunava Sen,Indian Statistical Institute,New Delhi. Home page: http://www.isid.ac.in/~planning/asen.html   Primary Research Focus: Social choice theory,game theory,industrial organization theory.   JEL Areas: