We focus on changes in technology and campaign management to study the documented simultaneous increase in campaign spending and polarization. In our model, some voters are ideological while others are impressionable. If the distribution of voters between types is endogenous and depends on...

This paper studies the effect of electoral rule disproportionality and the effect of the number of competing parties on the degree of platform polarization by the means of a unidimensional spatial model with policy motivated parties. We show that platform polarization is decreasing in the level...