2008/24 LEM Working Paper Series

A computational voting model

Luigi Marengo, Corrado Pasquali
Social choice; object construction power; agenda power; intran- sitive cycles; median voter theorem.

  JEL Classifications
D71, D72

Social choice models usually assume that choice is among exogenously given and non decomposable alternatives. Often, on the contrary, choice is among objects that are constructed by individuals or institutions as complex bundles made of many interdependent components. In this paper we present a model of object construction in majority voting and show that, in general, by appropriate changes of such bundles, different social outcomes may be obtained, depending upon initial conditions and agenda, intransitive cycles and median voter dominance may be made appear or disappear, and that, finally, decidability may be ensured by increasing manipulability or viceversa.

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