The point of departure of this dissertation is the observation that, over the entire period for which statistics are available, regional differences in income per capita in Canada have remained unchanged. Five commonly recognized regions of the country are considered: the Maritimes, Quebec, Ontario, the Prairie Provinces, and British Columbia. Official statistical series show that the relative levels of income per capita in the five regions have been about the same in recent years as in the late 1920's, when the series begins. In a world of continuous change there may be no single expected trend of regional income differentials, but convergence does seem to be a common pattern among the industrially advanced nations of the world.2 The Canadian experience is sufficiently interesting to call for further examination. The dissertation summarized here begins this examination in two ways: estimates of regional per capita income are made for some years prior to the beginning of the official series and a preliminary examination of some important factors influencing regional income differences is begun.