In almost all societies, increasing residential segregation is considered to be a substantial threat to the welfare state. Strategies to decrease segregation and its negative societal effects are utilized in many urban areas worldwide, yet international comparisons of the effectiveness of various strategies are not commonplace. There are several reasons for the lack of comparison. Two of the most important include the inability of segregation measures to capture the spatial complexities of segregation, and the fact that geographical units of analysis (blocks, census tracts, municipalities, etc.) are so different in size and distribution that comparison makes little sense. Our research team has developed a new method for the creation of geographical units of analysis that enables comparison between countries and over time. The method makes use of statistics from existing geographical units but converts the statistics to values representing counts of individuals surrounding each neighbourhood. The method has been tested by researchers in several countries and has proven effective in comparative analysis of segregation between countries. The method opens up a possibility to compare the effectiveness of various local and international strategies for fighting segregation. The project initially involves comparison of four countries, but due to a large interest from other international researchers we envisage that the group of comparing countries will increase.