%0 Journal Article %T Variability in Electoral Behavior: Longitudinal Perspectives from Causal Modeling %A Schulman, Mark A. %A Pomper, Gerald M. %D 1975 %P 1-18 %J American Journal of Political Science %V 17 %I 1-2 %2 ISSN: 0092-5853 %U http://www.jstor.org/stable/2110689