1 Division of Pulmonary and Critical Care Medicine, Zuckerberg San Francisco General Hospital, University of California, San Francisco, San Francisco, California, United States of America.
2 Global Tuberculosis Programme, World Health Organization, Geneva, Switzerland.
3 Department of Epidemiology and Biostatistics, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, United States of America.
In this Perspective on the research article by William Rudgard and colleagues, Priya Shete and coauthor discuss the challenges of measuring the impact of social protection programs such as cash transfers.