Nationalization and Regionalization in the Canadian Party System, 1867-2015

The regionalization of the Canadian party system is a topic that has occupied Canadian scholars for decades. While there have undoubtedly been periods of significant regionalization (for example, the 1990s) and while these periods have been well documented, there has been very little systematic study of regionalization/nationalization in the Canadian party system. We address this gap by exploring nationalization of the Canadian party system from 1867 to 2015. To do so, we apply two measures. First, we consider how nationalized party competition is by exploring the extent to which parties compete in districts across the entire country. Second, we compliment this approach by applying the Gini coefficient to vote shares, revealing the extent to which Canadian parties have (un)even electoral support from province to province. In doing so, we explore not only the system as a whole but individual parties as well.