Past findings on the connection between class position and political preferences are overwhelmingly derived from cross-sectional studies, which provided a limited basis for inferring causality. This study uses long-term panel data on thousands of British respondents to measure the impact of intra-generational class mobility across a range of political identities and preferences. Upward class mobility leads to small increases in economic conservatism, but party choice, class identity and attitudes to non-economic issues do not change. This updating of economic values is much smaller than cross-sectional differences between classes. These results are consistent with the short-run effects of class mobility operating primarily through a limited economic self-interest mechanism. Beliefs that are plausibly unconnected to economics are unaffected. The overall association between class and a range of identities, opinions and preferences is therefore more likely to be caused by early life experiences and longer-term socialization than by the immediate material interests associated with jobs.

This article builds on V.O. Key’s postulate that voters are not fools and that they function as an echo chamber reflecting the clarity of alternatives presented to them. We first propose a reassessment of Key’s claim by examining whether and to what extent the impact of issue preferences on the vote choice depends on the clarity of parties’ profile on these issues. Our empirical tests are based on data from the 2007 Swiss election study and cover three different issues that voters may use as decision-making criteria. Our results confirm that the clearer a party’s profile on a given issue, the higher the impact of that issue on the vote for the party. Second, we offer a refinement of Key’s argument by arguing that voters’ political sophistication conditions the strength of issue voting. Empirical evidence supports this argument, but shows that the effect of political sophistication is curvilinear: sophistication exerts a stronger mediating role when a party has a moderately clear profile than when it has a low or high profile.