The Boston University Law Review recently published "The Regional Impact of the Civil Rights Act of 1964," by Gavin Wright (Stanford University). Full text is now available online.
I couldn't find an abstract, but the paper appears to be a spin-off from Wright's 2013 book, Sharing the Prize: The Economics of the Civil Rights Revolution in the American South (Harvard University Press). We've mentioned the book previously here.
Hat tip: Poverty Law