A 25-year study of high-tech companies shows that multiple founders may increase a start-up's chances for success.

Larger founding groups start with more capital, generate more sales earlier, and work longer hours, the study reports. In one subgroup of 20 young companies, 63% of those with more than two founders performed better than average, while only 20% of those with one or two founders exceeded average performance.

-- From Entrepreneurs in High Technology: Lessons from MIT and Beyond, by MIT professor Edward B. Roberts, published this spring by Oxford University Press