Is Uncle Sam Inducing the Elderly to Retire?” Laurence Kotlikoff, Boston University

U.S. Inequality, Fiscal Progressivity, and Work Disincentives: An Intragenerational Accounting,” Alan J. Auerbach, Laurence J. Kotlikoff and Darryl Koehler, National Bureau of Economic Research

Fiscal Analysis Center, a think tank focused on studying the stability of U.S. fiscal policies

Survey of Consumer Finances, U.S. Federal Reserve Board, data from 2016 and earlier surveys