The Iceberg Theory of Campaign Contributions: Political Threats and Interest Group Behavior
Marcos Chamon and Ethan Kaplan ,
( 5 )
American Economic Journal: Economic Policy
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We present a model where special interest groups condition contributions on the receiving candidate’s support and also her opponent’s. This allows interest groups to obtain support from contributions as well as from threats of contributing. Out-of-equilibrium contributions help explain the missing money puzzle. Our framework contradicts standard models in predicting that interest groups give to only one side of a race. We also predict that special interest groups will mainly target lopsided winners, whereas general interest groups will contribute mainly to candidates in close races.

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