Douglas Barthold, Arijit Nandi, and José M. Mendoza Rodríguez are with the Institute for Health and Social Policy, McGill University, Montreal, Quebec. Douglas Barthold is also with the Department of Economics, McGill University. Arijit Nandi is also with the Department of Epidemiology, Biostatistics, and Occupational Health, McGill University. Jody Heymann is with the Fielding School of Public Health, University of California, Los Angeles.