We discuss the theory of voting rules which are immune to gerrymandering. Our approach is axiomatic. We show that any rule that is unanimous, anonymous, and representative consistent must decide a social alternative as a function of the proportions of agents voting for each alternative, and must either be independent of this proportion, or be in one-to-one correspondence with the proportions. In an extended model in which voters can vote over elements of the unit interval, we introduce and characterize the quasi-proportional rules based on unanimity, anonymity, representative consistency, strict monotonicity, and continuity. We show that we can always (pointwise) approximate a single-member district quota rule with a quasi-proportional rule. We also establish that upon weakening strict monotonicity, the generalized target rules emerge.
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Paper provided by California Institute of Technology, Division of the Humanities and Social Sciences in its series Working Papers with number
1218.
Length: 30 pages Date of creation: Mar 2005 Date of revision: Publication status: Published: Handle: RePEc:clt:sswopa:1218
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Chambers, Christopher P., 2005.
"Consistent Representative Democracy,"
Working Papers
1217, California Institute of Technology, Division of the Humanities and Social Sciences.
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