Here is a job market paper from Andreas Ferrara, University of Warwick:
This paper argues that the unprecedented socioeconomic rise of African Americans at mid-century is causally related to the labor shortages induced by WWII. Results from combining novel military and Census data in a difference-in-differences setting show that counties with an average casualty rate among semi-skilled whites experienced a 13 to 16% increase in the share of blacks in semi-skilled jobs. The casualty rate also has a significant reduced form effect on cross-state migration, wages, home ownership, house value, and education for blacks. Using survey data from 1961, IV regression results indicate that the economic upgrade, which is instrumented with the semi-skilled white casualty rate, is also associated with an increase in social status. Both black and white individuals living in treated counties are more likely to have an interracial friendship, live in mixed-race neighborhoods, and to have reduced preferences for segregation.
Via John Holbein.