According to the Metropolitan Policy Program at the Brookings Institution,

After substantial progress against concentrated poverty during the booming economy of the late 1990s, the economically turbulent 2000s saw much of those gains erased.

According to its report, “The Re-Emergence of Concentrated Poverty,”  concentrated poverty—being poor in a very poor neighborhood—limits educational opportunity, leads to increased crime rates and poor health outcomes, hinders wealth building, increases the prices for good and services, and raises the costs for local government. To read more, and download a full copy of the report click here.