Ideology,Salience, and Complexity: Determinants of Policy Issue Incongruence between Voters and Parties

How come voters and their parties agree or disagree on policy issues? We claim that voter–party mismatches are due to a lack of information of voters regarding parties' positions. Three mechanisms determine levels of information: ideology, salience, and complexity. We test these ideas drawing on a large sample of policy statements (50) presented to voters and party leaders prior to regional elections in Belgium. Contrary to existing studies, we include predictors on all three levels: issue, voter, and party level. We find support for our claim. Major ideological divides such as the left–right divide yield useful information to the voters about where parties stand. Salience also generates information for voters, or makes information more accessible for voters, which decreases the odds that they have a different stance than their party. Our measures of complexity yielded the expected results too. When the task of voting is made more difficult, voters succeed less in voting for a party that matches their preferences.