TY - JOUR T1 - Variability in Electoral Behavior: Longitudinal Perspectives from Causal Modeling AU - Schulman, Mark A. AU - Pomper, Gerald M. PY - 1975 SP - 1 EP - 18 JO - American Journal of Political Science VL - 17 IS - 1-2 SN - 0092-5853 UR - http://www.jstor.org/stable/2110689 ER -