Explaining interest group position-taking across partisan policy dimensions

Some interest groups have policy positions on one or more policy dimensions in partisan policy space while others do not. In this paper we examine explanations for differences in interest group position-taking across policy dimensions. While group characteristics are likely to explain parts of such variation in interest group position-taking, we hypothesise that the salience and polarisation among parties and citizens of the respective policy dimension also matter. By utilising novel survey data on interest group positions (within a predefined policy space) in six different countries as well as survey data on citizen and party positions, we investigate interest group position-taking across policy dimensions. The analysis shows that interest groups with more resources, core interests linked to the examined policy dimensions and a connection to the traditional party system are more likely to have policy positions than other groups. Furthermore, we find evidence of groups supplementing citizens and parties in policy space by articulating positions on policy dimensions that the average citizen and party pays less attention to. Moreover, when party polarisation increases on a dimension, greater party salience is negatively associated with group position taking.