This paper summarizes the findings from the Self Sufficiency Project: a large scale social experiment that is being conducted in Canada to evaluate the effect of high-powered financial incentives for full time work among former welfare recipients. The experimental results confirm the importance of financial incentives in the welfare participation and work decisions of low-income single mothers. Enhanced incentives induce a significant fraction of welfare recipients to leave the program and enter work. They also have a relatively large anti-poverty effect. Moreover, when incentives are offered to relatively short-term recipients, they can actually save the government money.