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Interest in politics is important for a host of political behaviors and beliefs. Yet little is known about where political interest comes from. Most studies exploring the source of political interest focus on parental influences, economic status, and opportunity. Here, we investigate an alternative source: genetic transmission. Using two twin samples, one drawn from Denmark and the other from USA, we find that there is a high degree of heritability in political interest. Furthermore, we show that interest in politics and political efficacy share the same underlying, latent genetic factor. These findings add to the growing body of literature that documents political behaviors and attitudes as not simply the result of socialization, but also as part of an individual's genetically informed disposition. [ABSTRACT FROM PUBLISHER]

Governments in democratic systems are expected to respond to the issue preferences of citizens. Yet we have a limited understanding of the factors that cause levels of responsiveness to vary across time and between countries. In this article, the authors suggest that political contestation is the primary mechanism driving policy responsiveness and that this, in turn, is mediated by political institutions and government popularity. To test this proposition, the authors analyze the responsiveness of executive policy promises (speeches) and policy actions (public expenditure) in Britain, Denmark, and the United States in the period from 1970 to 2005. These time-series analyses show that higher levels of political contestation are associated with more responsive executives. [ABSTRACT FROM AUTHOR]