Institute of Governmental Studies

Analyses of roll call votes claim that the European Parliament is increasingly becoming a 'normal' parliament in which transnational party groups compete in a low-dimensional ideological space dominated by the classic socio-economic left-right conflict. This paper assesses the validity of this claim by comparing roll-call voting behavior in the European Parliament against preferences of legislators as expressed in the 1996 Members of European Parliament Survey. The results corroborate that low-dimensional ideological competition drives the behavior of parliamentarians to a substantial degree. The individual ideological convictions of parliamentarians are an important independent source of their voting behavior. Moreover, there is no evidence that gatekeeping institutions artificially suppress one or more important dimensions of policy contestation. Finally, European party groups are indeed effective in swaying legislators towards their ideal points. Previous research has, however, overstated the importance of socio- economic conflict to the detriment of value-based libertarian-traditional contestation.