In NPR's latest article titled How do you know if aid really works? Turns out, we often don’t, 3ie's executive director Emmanuel Jimenez discusses the steady rise in the production of impact evaluations and the need for researchers to work directly with policymakers. Read the full article which includes interviews with J-PAL's Rachel Glennerster, Abhijit Banerjee and the Center for Global Development's Amanda Glassman.