Institutionalization of Voting Patterns, or is Mobilization the Source of Decay?

The effect of electoral mobilization upon the decay of political institutions is examined with reference to the stability of aggregate voting patterns in Western Europe. Historical time series are studied empirically to test predictions derived from a formal model. The conclusion is that demobilization of groups, rather than mobilization of new voters, threatens the stability of electoral institutions. It is argued that electoral mobilization is a process through which political institutions preserve stability of social relations.