Shirley Johnson-Lans is Professor of Economics at Vassar College, USA. Her principle areas of specialization are applied micro-economics, labor economics, and health economics. Her publications include many journal articles and book chapters on a wide variety of subjects ranging from child marriage in India to an analysis of the Affordable Care Act. She is the author of A Health Economics Primer.ContributorsOliva D’Aoust, World Bank GroupPatricia Jones, Oxford University, UKLouise Bernard, Oxford University, UK