PT - JOURNAL ARTICLE AU - Nicole Maestas TI - Back to Work AID - 10.3368/jhr.45.3.718 DP - 2010 Jul 01 TA - Journal of Human Resources PG - 718--748 VI - 45 IP - 3 4099 - http://jhr.uwpress.org/content/45/3/718.short 4100 - http://jhr.uwpress.org/content/45/3/718.full SO - J Hum Resour2010 Jul 01; 45 AB - This paper analyzes a puzzling aspect of retirement behavior known as “unretirement.” Nearly 50 percent of retirees follow a nontraditional retirement path that involves partial retirement or unretirement, and at least 26 percent of retirees later unretire. I explore two possible explanations: (1) unretirement transitions result from failures in planning or financial shocks; and (2) unretirement transitions are anticipated prior to retirement, reflecting a more complex retirement process. I show that unretirement was anticipated for the vast majority of those returning to work, and is not a result of financial shocks, poor planning or low wealth accumulation.