"[A]bout half of the 10-percentage-point advantage in Social Security replacement rates for SSDI beneficiaries is due to the actuarial adjustment applied to retirement benefits, implying that career earnings are not that different between retired workers and SSDI beneficiaries. But total replacement rates are substantially lower for SSDI beneficiaries, which indicates that, despite Social Security's vital role in providing a reliable income source, SSDI beneficiaries have much lower post-career well-being than retired workers."  MORE >>