During the 1990s changes in the earnings test threshold and the delayed retirement credit had the potential to impact the labour supply of 65 to 69-year-olds. These changes in Social Security rules are used to examine whether labour supply behaviour of elderly men and women is 'myopic' or 'farsighted'. Men are found to be more farsighted than previously realized, perhaps due to increases in life expectancy.
Rubb, Stephen D., "US Social Security Rules in the 1990s: A Natural Experiment in Myopic and Farsighted Behaviour" (2002). WCBT Faculty Publications. 174.