LEFTISM IS BAD FOR PEOPLE AND OTHER LIVING THINGS: America’s Bad Cities Are Costing You. “Does crime reduce the extent of agglomeration economies? To a major extent, yes, and we know it thanks to a suite of different disasters—bombings, fires, earthquakes, hurricanes, etc.—, to random events that displaced populations—the Mariel Boatlift, Japanese internment, close elections that appointed discriminatory mayors, etc.—, to the historical period known as the Great Migration—the mass movement of African Americans from the southeastern U.S. to the rest of the country’s urban areas. My replication package deals with all of these, and they produce convergent results, but for this article, I’ll just talk about the clearest example.”

Some fascinating stuff at the link.