Measuring Power in Weighted Majority Games
This paper suggests an indicator of power in weighted majority games. An indicator of power determines the ability of a voter to inï¬‚uence the outcomes of the voting bodies he belongs to. In a weighted majority game each voter is assigned a certain nonnegative real number weight and there is a positive real number quota such that a group of voters can pass a resolution if the sum of the weights of the group members is at least as high as the given quota. The new index is shown to satisfy all the reasonable postulates for an index of voting power. If attention is restricted to weighted majority game only, then this index may be considered as an extension of the Banzhaf-Coleman power indices. Finally, the paper develops an axiomatic charï¾acterization of the new index.
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|Date of creation:||07 May 2007|
|Date of revision:|
|Publication status:||Published in Homo Oeconomicus 2005, vol. 22 no. 4, pp. 459-486|
|Contact details of provider:|| Postal: Iowa State University, Dept. of Economics, 260 Heady Hall, Ames, IA 50011-1070|
Phone: +1 515.294.6741
Fax: +1 515.294.0221
Web page: http://www.econ.iastate.edu
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