No Representation Without Compensation: The Effect of Interest Groups on Legislators' Policy Area Focus.

Interest groups seek to influence parliamentarians' actions by establishing exchange relationships. We scrutinize the role of exchange by investigating how interest groups impact parliamentarians' use of individual parliamentary instruments such as questions, motions, and bills. We utilize a new longitudinal dataset (2000-2015) with 524 Swiss parliamentarians, their 6342 formal ties to interest groups (i.e., board seats), and a variety of 23,750 parliamentary instruments across 15 policy areas. This enables us to show that interest groups systematically relate to parliamentarians' use of parliamentary instruments in the respective policy areas in which they operate-even when parliamentarians' time-invariant (fixed effects) and time-variant personal affinities (occupation, committee membership) to the policy area are accounted for. Personal affinities heavily moderate interest groups' impact on their board members' parliamentary activities. Moreover, once formal ties end, the impact of interest groups also wanes. These findings have implications for our understanding of how interest groups foster representation in legislatures.

Affective Polarization and Political Belief Systems: The Role of Political Identity and the Content and Structure of Political Beliefs.

We investigate the extent that political identity, political belief content (i.e., attitude stances), and political belief system structure (i.e., relations among attitudes) differences are associated with affective polarization (i.e., viewing ingroup partisans positively and outgroup partisans negatively) in two multinational, cross-sectional studies (Study 1 N = 4,152, Study 2 N = 29,994). First, we found a large, positive association between political identity and group liking-participants liked their ingroup substantially more than their outgroup. Second, political belief system content and structure had opposite associations with group liking: Sharing similar belief system content with an outgroup was associated with more outgroup liking, but similarity with the ingroup was associated with less ingroup liking. The opposite pattern was found for political belief system structure. Thus, affective polarization was greatest when belief system content similarity was low and structure similarity was high.