The Probabilistic'''probabilistic voting theory''', also known as the '''probabilistic voting model''', is a [[voting theory]] developed by professor [[Peter J. Coughlin]], 1992, which is gradually replacing the [[Medianmedian voter theory]], thanks to its ability of finding the existenceto offind an equilibrium in a multi-dimensional space. This theory represents a real break-through in the [[political economy]] literature and allowed to solve problems impossible to solve before. In fact, unlike the median voter theory, what drives the equilibrium policy is both the numerosity and the density of social groups and not the median position of voters on a preference scale. This difference allows to explain why social groups which have a great homogeneity of preferences are more political powerful than those whose preferences are dispersed.
==Applications==
The [[political economy]] and the [[Publicpublic Economicseconomics]] are the main fields where the Probabilisticprobabilistic voting theory is applied. In particular, it was used to explain public expenditure programmes (Persson & Tabellini, 2000), social security systems (Profeta, 2002) and taxation (Hettich & Winer, 1999 and Canegrati, 2007).
