We analyze a one-dimensional model of spatial political competition with two parties and uncertainty on the distribution of voters types. We assume that parties are formed by regular members and professional politicians; members care about the policy enacted, while professional politicians, on...

We propose a theory of party competition (two parties, single-issue) where citizens acquire party membership by contributing money to a party, and where a member's influence on the policy taken by her party is proportional to her campaign contribution. The polity consists of informed and...

The basic idea behind this paper is that voters have to be able to distinguish the positions of the parties. Following Weber’s Law this depends on the relative distance with respect to their own optimal position. Using such a measure a model of voter participation is developed which allows for...

Following Axelrod's tournaments for strategies in the repeat-play prisoner's dilemma, we ran a ``tournament of party decision rules'' in a dynamic agent-based model of party competition. We asked researchers to submit rules for selecting party positions in a two-dimensional policy space, pitting...

This paper examines the role of coalition formation in the empirically observed negative correlation between employment protection and unemployment benefit. We study an economy composed of four groups of agents (capitalists, unemployed people, low- and high-skilled workers), each one represented...

Which combinations of values and perceptions constitute the arguments in the debate on European integration? Using survey data from Norway's 1994 EU referendum, this article explores Norwegian voters' support for these arguments. Thus, the article highlights the perceptions and arguments of the...

We extend the directional theory of issue voting from a strictly deterministic model to a model which incorporates voter uncertainty. In the model, each voter has a probability of preferring a given direction of policy with regard to an issue and each party has a probability of pursuing a given...

The directional theory of issue voting - a new theory proposed by Rabinowitz and Macdonald - has, in a series of analyses, been shown to outperform the old Downsian proximity theory. This result has a very practical consequence: according to the directional theory, a centrist party cannot expect...

Formal theory has often been criticized for shying away from empirical testing, which brought some to wonder about its empirical relevance altogether. Theorists, on their side, often responded by accusing much of the empirical work in political science as being devoid of any theoretical...

Although there are well-developed theories of two-party competition in a one-dimensional policy space, it has proven extremely difficult to construct a model of multi-party competition (with three or more parties) in two or more dimensions. One difficulty with developing such a model is due to...