There are a number of competing hypotheses to explain the persistence of urban labor market problems for minority workers. These hypotheses can generally be classified into demand side and supply side explanations. Demand side explanations include discrimination, the decline in demand for unskilled workers, and the lack of jobs for inner city workers. Job unavailability is generally attributed to deindustrialization, occupational bifurcation (skills mismatch). This survey examines the recent literature on the spatial mismatch hypothesis, a research agenda that has generated a considerable level of empirical work for explaining the persistent problems of black workers.