An exhaustive study (link opens a PDF) of Norwegian entrepreneurial activity found that common stock investors (used as a measure of risk-tolerance) are about 1.5 times more likely to start a business than non-investors. The trouble is, they're also more likely to perform worse and eventually fail. Stock market participants who start businesses had, on average, 22% lower sales, 27% lower employment, and a 2.55% lower probability of surviving four years than their non-investing peers.

Image: Flickr / jfdervin.