Empirical Banzhaf Indices

Andrew Heard and Tim Swartz

Public Choice, 1998, vol. 97, issue 4, 07 pages

Abstract: This paper considers a generalization of the Banzhaf index which is used to quantify voting power in constituent bodies. The generalization allows unequal probabilities in voting outcomes and relies on historical voting data to highlight natural coalitions that exist between various constituent bodies. The approach is based on Bayesian modeling where estimates of voting probabilities are given by the posterior means of Dirichlet distributions. An example is provided concerning the voting power of provinces according to the amending formula to Canada's Constitution. Copyright 1998 by Kluwer Academic Publishers

Date: 1998
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