Another concern is the manner in which economic policy erects obstacles to older-worker participation in the current labor market. Such obstacles, for example, may take the form of disincentives within the Social Security system and private pension plans. Eligibility for social-security retirement payments begins at age 65. An individual who defers retirement and the start-date of benefits will eventually receive a slightly higher monthly income, which includes an incentive payment for deferring retirement. However, this incentive may not be sufficient to make up for the present value of income foregone. Similarly, a person who continues to work, even part-time, after retirement, faces limitations on the amount of income that can be earned without consequences to social-security income. The compelling incentive for many, then, will be to retire upon eligibility (Quinn & Burkhauser, 1993).