Countries that elect their policy-makers by means of Plurality Voting tend to have a two-party system. We conduct laboratory experiments to study whether alternative voting procedures yield a two-party system as well. Plurality Voting is compared with Approval Voting and Dual Voting, both of...

Countries that elect their policy-makers by means of Plurality Voting tend to have a two-party system. This observation can be explained by the strategic behavior of voters. The present paper derives two broad classes of voting procedures under which strategic voting behavior induces a two-party...