The study conducted by Joseph Raffiee and Jie Feng lasted until 2008 and followed five thousand American entrepreneurs who either “took the leap” and quit their day jobs or kept them. And the results surprised them, defying what we might think the typical entrepreneurial success looks like. In the end, the more cautious entrepreneurs ended up being the more successful ones, whereas the risk takers who quit their jobs early were 33 percent more likely to fail.