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This is a revised version of a paper prepared for the annual meeting of the Midwest Political Science Association, Chicago, April 1993. The authors would like to thank Susan Scarrow, Robert Rorschneidcr, Michael Gallagher and two anonymous referees for helpful comments, Roland Cayrol. Andrew Appleton and Torben Worre for providing opinion poll results, and Donley Studlar for making it all possible.
Franklin et al. (Thu,) studied this question.