Politician preferences, law-abiding lobbyists and caps on political contributions

The effect of a contribution cap is analyzed in a political lobbying game where the politician has a policy preference. In contrast to the previous literature without politician policy preferences, more restrictive binding caps always reduce expected aggregate contributions. However the initial imposition of a cap increases contributions if the politician mildly favors the low-valuation lobbyist’s policy. The introduction of policy preferences permits analysis of monied interests’ policy influence. A more restrictive cap makes it more likely that the politician enacts the policy he would have enacted in the absence of lobbying, even in cases where expected aggregate contributions increase.