Affiliation: | 1. General Motors Research Laboratories, 48090, Warren, Michigan, USA 2. Dept. of Economics, New York University, 538 Tisch Hall, Washington Square, 10003, New York, N.Y. 3. Norwegian School of Economics and Business Administration, USA 4. Osaka University, Toyonaka, Osaka, Japan 5. Dept. of Operations Research, Cornell University, 14850, Ithaca, N.Y. 6. Dept. of Mathematics, University of California, 90024, Los Angeles, Cal., USA 7. International Institute for Applied Systems Analysis, Schlo? Laxenburg, Austria 8. Management Centre, The University of Aston, 36 Wake Green Road, B 13 9PD, Birmingham, England 9. The Open University, Bletchley, Bucks 10. Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, Japan 11. Faculty of Applied Mathematics, State University Leningrad, Leningrad, USSR 12. Dept. of Economics, Tel-Aviv University, Tel-Aviv, Israel
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