Interest groups can influence political decisions in two distinct ways: by offering contributions to political actors and by providing them with relevant information that is advantageous for the group. We analyze the conditions under which interest groups are more inclined to use one or the...

We analyze the incentives for interest groups to lobby the legislature for favorable policy and compare two institutional frameworks, a U.S. Congress-style legislature and a European-style parliament. The results provide a rationale for why lobby groups are more active in the U.S. Congress. The...