The strongly stable core in weighted voting games

The problems associated with the concept of the core in spatial voting games such as non-existence and instability are well documented. The structurally stable core, presented by Schofield, attempts to resolve these problems by looking at the subset of the core which is still nonempty after a small change in voter preferences. Although this concept, combined with the adoption of supramajoritarian voting rules and weighted voting games, may very well explain the observed stability in reality, it may not be suitable for certain coalition situations. This article proposes a new solution concept, the strongly stable core. The conditions for the existence and the potential location of the strongly stable core are then explored and compared with those of the structurally stable core.     

Voter ideology in Western Democracies, 1946– 1989

Abstract. We propose a measure of voter ideology which combines party manifesto data compiled by Budge, Robertson, Heari, Klingemann, and Volkens (1992) and updated by Volkens (1995), with election return data. Assuming the comparability and relevance of leftright ideology, we estimate the median voter position in 15 Western democracies throughout most of the postwar period. The plausibility of our assumptions, and therefore the validity of our measure, is supported by the results of several validity tests. With this new measure we are able to make crossnational comparisons of voter ideology among these countries as well as crosstime comparisons within individual countries. We discuss the potential application of our measure to various debates in political science.     

Government partisanship in Western democracies, 1945–1998

Abstract. In this article, we put forward a continuous measure of government partisanship, which allows meaningful comparisons across countries and across time, for 17 Western democracies for the period of 1945 through 1998. Our measure is predicated upon a manifesto-based measure of party ideology recently developed by Kim and Fording (1998), along with yearly cabinet post data. After discussing the validity of our measure, we replicate one of the most cited works in comparative political economy over the last ten years – Alvarez, Garrett and Lange's (1991) analysis of economic performance – by utilizing our own measure of government partisanship. We conclude that comparativists need to exercise greater caution in interpreting and evaluating the past findings of a large number of multivariate studies in comparative politics.