Information on the geographic distribution of innovation and entrepreneurship is not easy to tease out of many federal statistical data sets, leading regional policy often to be based on trends in all business starts or life span and size—ignoring the fact that some firms have greater impact on regional economic growth than others. The U.S. Census Bureau is well aware of the challenge and, earlier this week, released an experimental data set that allows for an examination of state-level long-term trends in the change in high-growth firms and establishments across the nation.