America's start-up culture is waking up from its post-recession slumber.
New business creation has long been sluggish compared with previous decades. In 2013, it hit a 20-year low. But since then, the pace of start-up creation has climbed for two years running, according to a study by the Ewing Marion Kauffman Foundation, and is approaching levels not seen since before the recession, in 2008 and 2009. Significantly, new entrepreneurs are opening up shop not because of necessity — in other words