Somdeb Lahiri Institute of Petroleum Management Gandhinagar, PD Petroleum University   Institute of Petroleum Management Gandhinagar, PD Petroleum University P.O. Raisan (Off Airport Road) Gandhinagar, Gujarat 382 007 India   somdeb.lahiri@yahoo.co.in   http://www.ipmg.ac.in/somdeb.lahiri   Biographical Sketch: Born:May 1,1957. Educational Qualification :Ph.D (Economics),University of Minnesota (Twin Cities),USA. Present Designation:Professor Institute of Petroleum Management, Gandhinagar (PD Petroleum University).   Primary Research Focus: Social Choice Theory   JEL Areas: D7 : Analysis of Collective Decision-Making: General C0 : Mathematical and Quantitative Methods: General