Accelerating growth: Startup accelerator programs in the United States (Ian Hathaway, Brookings)

A convergence of factors in information technology and capital markets have helped propel a boom in venture capital-backed startups in recent years. While well-established regions such as San Francisco-Silicon Valley, Boston-Cambridge, and New York account for the lion’s share of startup activity and funding, significant evidence suggests that a non-trivial amount of early stage capital is dispersing geographically throughout the United States.

http://www.brookings.edu/research/papers/2016/02/17-startup-accelerator-programs-hathaway