The chapter examines the relationship between the size and diversity of the expellee population and entrepreneurship and occupational change in West Germany. Using statistical data at the municipal and county levels, it documents a reversal of fortune: although expellee presence presented economic challenges in the immediate postwar period, in the long run, it increased entrepreneurship rates, education, and household incomes. The more regionally diverse the expellee population, the better the long-run economic performance in receiving communities.

The chapter examines how the size and diversity of the migrant population shaped economic outcomes in western Poland using statistical analysis. It shows that when state institutions were extractive, the composition of the migrant population played no role in shaping economic performance. Once institutions became more inclusive, however, municipalities settled by more regionally diverse populations registered higher incomes and entrepreneurship rates. The chapter then rules out a series of alternative explanations for these findings.

This chapter introduces cases motivating the book and presents a three-step argument about the effects of forced migration on societal cooperation, state capacity, and economic development. It reviews evidence from post-WWII displacement in Poland and West Germany, discusses the applicability of the findings to other cases, and highlights the main contributions of the book.