Technological change, globalization, and other shifts in demand and costs are not new to the U.S. economy, but  See Ganong and Shoag (2017) and references therein for more on the decline in income convergence. See Goetz, Partridge, and Stephens (2017) and Economic Innovation Group (2016) for details on growing regional differences during the recovery.
13 14  -8there are troubling signs that less diversified or connected localities have a diminished ability to adapt. And the evidence suggests that concentrated economic shocks and the associated labor market stress also have broader consequences for health and mortality.