Notes
This is a revised version of a paper presented at the 1981 Annual Meeting of the American Political Science Association, New York, 1981, and at a Joint International Seminar, the University College of North Wales, 1981. Comments on previous drafts by A. Breton, F.‐P. Gingras, G. Le Cavalier, A. Masi, M. Smith and D. Von Eschen proved useful and are gratefully acknowledged.