The link between public opinion and public policy is of special importance in representative democracies, as we expect elected officials to care about what voters think. Not surprisingly, a large body of literature tests whether policy is a function of public preferences. Some literature also considers the mechanisms by which preferences are converted to policy. Yet other work explores whether and how the magnitude of opinion representation varies systematically across issues and political institutions. In all this research, public opinion is an independent variable—an important driver of public policy change—but it is also a dependent variable, one that is a consequence of policy itself. Indeed, the ongoing existence of both policy representation and public responsiveness is critical to the functioning of representative democracy.
