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Rational Choice Theory in Political Decision Making  

Scott H. Ainsworth

Rational choice theory builds from a very simple foundation. To wit: individuals are presumed to pursue goal-oriented behavior stemming from rational preferences. Rational choice theory benefits from the very precise formulations of its assumptions. Individual-level rationality is generally defined as having complete and transitive preferences. Both completeness and transitivity have precise, formal definitions. From complete and transitive preferences, one can develop utility function presentations reflecting those preferences. Utility functions have the advantage of establishing a measure and allowing one to assess attitudes toward risk. That is, utility functions can reflect risk acceptance, risk neutrality, or risk aversion. Although some rational choice theorists focus on individual-level decision making, most rational choice theorists consider the ways in which individuals’ decisions are aggregated into some sort of social outcome or social preference order. The aggregation of individuals’ preferences occurs in both social choice and game theoretic models. Arrow’s theorem is the best-known result in social choice theory. Arrow showed that the rationality of individuals’ preferences could not be readily preserved at the group level when those individuals’ preferences were aggregated. That is, individual-level rationality does not ensure group-level rationality. Put slightly differently, irrationality at the group level cannot impugn rationality at the individual level. Other examples highlighting the difficulty of aggregating individuals’ preferences into a collective outcome abound. For instance, game theoretic presentations of the collective action problem highlight how individually rational decisions can lead to suboptimal outcomes. Rational choice models have been used to model interactions in a wide array of political institutions. Rational choice models have been developed to tackle some of the most challenging concepts in the social sciences, even in areas long thought impenetrable to rational choice theorizing. For instance, concepts such as ideology or personal identification have typically been used as preestablished descriptors. In contrast to treating those concepts as extant descriptors, rational choice theorists have modeled the endogenous development of ideologies and personal identification. Given the complexity of social phenomena, the relative parsimony and the clarity of rational choice models can be particularly helpful. The usefulness of rational choice models stems from their parsimony and their applicability to a wide range of settings.


Strategic Voting Versus Sincere Voting  

Damien Bol and Tom Verthé

People do not always vote for the party that they like the most. Sometimes, they choose to vote for another one because they want to maximize their influence on the outcome of the election. This behavior driven by strategic considerations is often labeled as “strategic voting.” It is opposed to “sincere voting,” which refers to the act of voting for one’s favorite party. Strategic voting can take different forms. It can consist in deserting a small party for a bigger one that has more chances of forming the government, or to the contrary, deserting a big party for a smaller one in order to send a signal to the political class. More importantly the strategies employed by voters differ across electoral systems. The presence of frequent government coalitions in proportional representation systems gives different opportunities, or ways, for people to influence the electoral outcome with their vote. In total, the literature identifies four main forms of strategic voting. Some of them are specific to some electoral systems; others apply to all.