Approval voting in subset elections (Q1974608)

This paper deals with the addition of voter's individual preferences stated in terms of approval voting. When we change the set of candidates evaluated, if each individual adopts an utility maximizing strategy, the individual approval function will not change stated preferences. It is shown here how, when we add voter's preferences, this property may be violated, in the sense that, even if all individuals have the same approval function in a given subset of candidates, the overall election outcome in any other subset may contradict it.