Waiting for the Accelerator Bubble to Pop

Paul Graham of Y Combinator and Charlie Rose talk during TechCrunch Disrupt New York in 2011 Photograph by Joe Corrigan/Getty Images

Since Paul Graham launched Y Combinator in 2005, the field of startup incubators and accelerators has exploded in the U.S. and overseas, with new entries emerging in all manner of oddball shapes and sizes, from a 80,000-square-foot space in San Jose, Calif., dedicated to tech companies hoping to do business in China, to a program that offers entrepreneurs cash to develop their business in Chile.

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