Is the Size Distribution of Income in Canada a Random Walk?

Several recent studies have investigated whether the size distribution of income in the United States follows a random walk meaning that it has a unit root, with mixed results. In this paper, we investigate the same issue using Canadian national and provincial income inequality data. The investigation is conducted using three different unit root tests. The results suggest modeling the Gini coefficients for Canada and for most provinces as an I(1) is quite reasonable.