Economic Theories of Voter Turnout
探讨理性选民为何投票的悖论，分析投票成本与收益的权衡，指出理性选择理论在解释投票行为时面临的三个核心矛盾，对民主制度的理性基础提出质疑。
The rationality of voting is the Achilles' heel of rational choice theory in political science. (Aldrich, 1997) In modern democracies thousands of citizens are eligible to vote in each election. An individual vote cast in such an election will conceivably have a negligible effect on its outcome. This leads to three interesting paradoxes: (i)The voting paradox Why would the rational individual bother to spend time and ;resources to become well informed, go to the polls on the election day and maybe even wait in a queue? Why would a rational voter vote? (Downs, 1957) (ii)The paradox of indeterminacy If they vote why do they care who they vote for? (Kirchgassner, 1992; Kirchgassner and Pommerehne, 1993) (iii)The paradox of ignorance To the extent that information is costly, the rational voter must be ignorant about relevant aspects of his decision making (Downs, 1957). The answer to this last question has serious implications. If the only alternative one is left with is to label the voter as an irrational individual, then how can democracy and its institutions be defended and studied on rational grounds? Moreover, what will be the normative properties of social equilibria stemming from voting institutions, if individuals have a basic incentive to abstain, and the ones who vote are not rational? This would imply a fundamental flaw in the voting system, if indeed the models capture reality!