It’s a short word packed with a ton of meaning. But what exactly is a startup? Like so many things in business, there’s no simple definition—nor lots of agreement. For some, a startup is any ...

Eisenmann, Thomas, Eric Ries, and Sarah Dillard. "Hypothesis-Driven Entrepreneurship: The Lean Startup." Harvard Business School Background Note 812-095, December 2011. (Revised July 2013.) ...