When do political parties listen to interest groups?

This paper examines when parties listen to interest groups and adopt their input. Interest group information can help parties bolster their positions, and by taking their input into account, parties show that they are responsive to the groups' interests which can increase their appeal to their constituents. Listening to interest groups can, however, also repel voters who disagree with the groups' positions. This paper argues that party and issue-level characteristics affect whether the benefits of listening to interest groups exceed the costs. Examining more than 25,000 party-interest group observations on 88 Norwegian policy proposals and using a text reuse approach to measure interest group influence, the findings indicate that public salience, party issue emphasis, interest group coalitions, and government status affect parties' propensity to listen. This implies that interest groups can be a pertinent source of information for parties under certain circumstances which affects the link between voters and parties.