"Evidence from a six-country study released in 2015 found that a “big push” intervention that aimed to address the many challenges of poverty simultaneously, boosted livelihoods, income, and health among the ultra-poor.

One year after the program ended—three years after receiving the assets—program participants on average had significantly more assets and savings, spent more time working, went hungry on fewer days, and experienced lower levels of stress and improved physical health compared to those who did not receive the program. The program was also cost effective, with positive returns in five of six countries, ranging from 133 percent in Ghana to 433 percent in India. In other words, for every dollar spent on the program in India, ultra-poor households had $4.33 in long-term benefits." https://www.poverty-action.org/impact/ultra-poor-graduation-model

Criteria: According to their list of research reports. Even a shallow review would count. https://www.givewell.org/research/research-on-programs.