Portfolio allocation or policy horizons? determinants of coalition formation in danish local government
- Oxfordshire : Taylor & Francis, dec. 2010
It is widely assumed that policy considerations are important when parties form government coalitions. But if this is so, and if coalitions are negotiated in multi-dimensional policy spaces with no majority parties, then a rapid turn-over of coalitions should be observed, cf. the chaos theorem. However, we rarely witness this. Here we analyse two of the most prominent theories that address this puzzle: Laver and Shepsle's portfolio allocation model; and Warwick's policy horizon hypothesis. We do not analyse the ‘usual suspects’ (i.e. national government formations in Europe), but present a new empirical testing ground: Danish local governments. We rely on Laver and Shepsle's Winset programme to identify ‘strong parties’ in the portfolio allocation model but develop a new measure of Warwick's policy horizons that better deals with problems of multi-dimensionality. In a conditional logit analysis of survey data from 3000 local councillors, we find support for the policy horizons model, but not for the portfolio allocation model