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On the Buyability of Voting Bodies
John Morgan, University of Cailfornia, Berkeley
ABSTRACT: We study vote buying by competing interest groups in a variety of electoral
and contractual settings. While increasing the size of a voting body reduces its
buyability in the absence of competition, we show that larger voting bodies may
be more buyable than smaller voting bodies when interest groups compete. In
contrast, imposing the secret ballot which we model as forcing interest groups
to contract on outcomes rather than votes is an e¤ective way to
ght vote
buying in the presence of competition, but much less so in its absence.
We also study more sophisticated vote buying contracts. We show that,
regardless of competition, the option to contract on both votes and outcomes
is worthless, as it does not a¤ect buyability as compared to contracting only on
votes. In contrast, when interest groups can contract on votes and vote shares,
we show that voting bodies are uniquely at risk of being bought.
SUGGESTED CITATION: John Morgan,
"On the Buyability of Voting Bodies"
(April 11, 2007).
Institute of Governmental Studies.
Paper WP2007-5.
http://repositories.cdlib.org/igs/WP2007-5
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