America's best program for the poor may be even better than we thought →

The Earned Income Tax Credit isn't super well-known, but it's one of the best tools the federal government has for fighting poverty. It functions as a wage subsidy for the working poor, providing an average of $2,982 a year to families with children come tax season. The results are impressive. According to the Census Bureau, refundable tax credits like the EITC and the similarly structured Child Tax Credit cut the poverty rate (correctly measured) by 3 percentage points in 2013 — that's 9.4 million people kept out of poverty.

But a new study suggests that even that is an underestimate. UC Berkeley economist Hilary Hoynes and the Treasury Department's Ankur Patel find that the EITC might be twice as effective at fighting poverty as the census estimate suggests.