A new meta-analysis by Michael Kremer and co-authors suggests water treatment could reduce child mortality by about 30% in low- and middle-income countries, making it a highly cost-effective treatment for saving lives. Kremer joined his co-author Stephen Luby to discuss some of their findings in an event hosted by the Development Innovation Lab and the Center for Global Development. For more information on the research, visit dil.uchicago.edu.