Affiliation: | a Department of Economics, The Swedish University of Agricultural Sciences, P.O. Box 7013, S-750 07, Uppsala, Sweden;b Georgia State University and Mirant Corporation, Mirant Corp. 1155, Perimeter Center West, Suite 130, Atlanta, GA 30338, USA;c Indian Statistical Institute, Delhi Centre, 7 S.J.S. Sansanwal Marg, New Delhi 110016, India |