We study voting decisions in a model where two three-party parliamentary legislatures jointly make policy decisions. In our model intergovernmental negotiations are carried out by the ruling parties/formateurs representing each jurisdiction with their agreement subject to a legislative...

We compare single ballot vs dual ballot elections under plurality rule, assuming sincere voting and allowing for partly endogenous party formation. Under the dual ballot, the number of parties is larger but the influence of extremist voters on equilibrium policy is smaller, because their...