RT Journal Article SR Electronic T1 Retirement and the Evolution of Pension Structure JF Journal of Human Resources JO J Hum Resour FD University of Wisconsin Press SP 281 OP 308 DO 10.3368/jhr.XL.2.281 VO XL IS 2 A1 Leora Friedberg A1 Anthony Webb YR 2005 UL http://jhr.uwpress.org/content/XL/2/281.abstract AB Defined benefit pension plans have become considerably less common since the early 1980s, while defined contribution plans have spread. Previous research showed that defined benefit plans, with sharp incentives encouraging retirement after a certain point, contributed to the striking decline in American retirement ages. In this paper we find that the absence of age-related incentives in defined contribution plans leads workers to retire almost two years later on average, compared to workers with defined benefit plans. Thus, the evolution of pension structure can help explain recent increases in the typical retirement age, after decades of decline.