Introduction and Summary to "Social Security and Retirement around the World: Historical Trends in Mortality and Health, Employment, and Disability Insurance Participation and Reforms"

Kevin Milligan and David A. Wise, Social Security Programs and Retirement around the World: Historical Trends in Mortality and Health, Employment, and Disability Insurance Participation and Reforms (University of Chicago Press, 2012), https://www.nber.org/books-and-chapters/social-security-programs-and-retirement-around-world-historical-trends-mortality-and-health/introduction-and-summary-social-security-and-retirement-around-world-historical-trends-mortality-and.