We construct the first estimates of U.S. county nominal and real GDP by broadly defined industrial sectors from 1870 to 2018. Counties tended to converge from 1870 until 1970, but subsequently grew apart. Falling inequality between states explains most of the fall in county inequality from 1870...

Why do some regions grow faster than others, and in ways that do not always conform to economic theory? This is a central issue in today’s economic climate, when policy makers are looking for ways to stimulate new and sustainable growth. OECD work suggests that there is no one-size-fits-all...