volume 18, issue 4, P504-522 2002
DOI: 10.1093/oxrep/18.4.504
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Abstract: Simple plurality election systems (commonly known as 'first past the post') are often associated with the dominance of two political parties. Such systems tend to reward leading parties with a disproportionately large number of seats (the 'mechanical' effect) and provoke tactical voting, where voters switch away from trailing parties (the 'psychological' effect). We view tactical voting as a coordination problem. A group of voters wish to prevent a win by a disliked party (such as the Conservatives in recent U…

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