While economic dynamism has powered U.S. prosperity for generations, it is now declining in nearly every definition of the term, according to new research from the D.C.-based think-tank and advocacy organization Economic Innovation Group (EIG). In Dynamism in Collapse, an analysis of economic conditions from 1977 to 2014, EIG finds that dynamism has decreased substantially, as seen in diminishing rates of job turnover, the share of employment in new companies, and the percentage of the population moving across state lines. This eroding dynamism, the report finds, has led to considerable challenges for regions, markets, and workers.