Institution: | (1) Department of Economics, Birkbeck College, University of London, 7-15 Gresse St., London W1P 2LL, UK (e-mail: pbag@econ.bbk.ac.uk), GB;(2) Department of Economics, University of Rochester, Rochester, NY 14627-0156, USA (e-mail: enmd@troi.cc.rochester.edu), US;(3) Department of Economics, Queen's University, Kingston, Ontario, K7L 3N6, CANADA (e-mail: wangr@qed.econ.queensu.ca), CA |