We develop a model of endogenous party platform formation in a multidimensional policy space. Party platforms depend on the composition of the parties? primary electorate. The overall social outcome is taken to be a weighted average of party platforms and individuals vote strategically....

We develop a model of endogenous party platform formation in a multidimensional policy space. Party platforms depend on the composition of the parties’ primary electorate. The overall social outcome is taken to be a weighted average of party platforms and individuals vote strategically....

We analyze existence of divergent equilibria in a model of endogenous party platforms with stochastic membership, while the membership depends bothon the proposals of the parties and the unobserved idiosyncratic preferecnces of citizens over parties. It is shown that when citizens view the...