This study tests an integrative model of corporate political action, the filter model, based on the behavioral theory of the firm. The filter model posits that external political, economic, and industry environments are mediated by organizational structures and resources to affect a firm’s political actions. The authors rate the filter model’s predictive power against that of an economic-based direct-effects model by examining the efforts of about 1,100 U.S.-domiciled manufacturing firms to influence trade policy. LISREL analysis demonstrates that the integrative filter (...) model provides a superior explanation of corporate political action. (shrink)