For the past thirty years scholars have debated the role of political parties in fiscal, monetary, and social welfare policies. Some argue that Social Democratic parties are more committed to advancing and maintaining welfare protection, while others claim that party ideology has ceased to explain parties' policy choices due to the constraining forces of economic globalization, deindustrialization, and electoral volatility. Indeed, the empirical findings in support of partisan arguments are mixed. Much of this rich literature treats political parties as uniform and cohesive entities when it...