Mortality differentials in beneficiaries of the National Institute of Social Security of Brazil in 2015^* * The authors thank the anonymous reviewers and guest editor for their useful comments and suggestions and help to improve the quality of the manuscript and analyses. In addition, the authors are grateful to the Economic Commission for Latin America and the Caribbean and the Institute of Applied Economic Research for the funding for this research project. Marcos R. Gonzaga, Everton E. C. de Lima, Bernardo L. Queiroz, and Flávio H. M. de A. Freire all receive productivity scholarships from CNPq (case numbers 307467/2018-0, 308219/2019-8, 312609/2018-3, and 303341/2028-1).