As Americans live longer, we are spending more time in retirement and placing increased burdens on younger generations. Although labor supply at older ages has increased modestly in recent years, people generally retire at much younger ages today than they did 50 years ago. Retirees now collect Social Security benefits longer than ever before, and the number of workers supporting each retiree is falling steadily. Encouraging older Americans to delay retirement would ease the economic pressures of an aging population by expanding the pool of productive workers, in turn promoting economic growth and generating additional goods and services to raise living standards. Improved health and less physically demanding jobs mean that most of today's older adults can work longer than did earlier generations.