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Founded by Rich Bendis

JEREMY QUITTNER

Apart from being some the most successful companies in the U.S., Dropbox, Reddit, Uber, and Airbnb share something else in common: They all spent time at startup accelerators.

It's no secret that accelerators have become an increasingly common resource for young companies like those looking for strategic guidance and a route to faster growth. Now there's research showing just how ubiquitous they've become. According to a blog post published on Thursday by Ian Hathaway, a non-resident senior fellow at Washington, D.C. think tank The Brookings Institution, the U.S. has been in the middle of an accelerator boom for a full 10 years.