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α: calibrated so average coauthorship-adjusted count equals average raw count
The US population will age rapidly for several decades and then more slowly, with less aging than most rich nations. Health of the elderly has greatly improved, but disability stagnated after 2000. Retirement age reversed its decline in the mid-1990s and health status leaves ample room for increased elder labor supply. Many older people have inadequate retirement savings and face additional risks including uncertainty about both public and private pensions and health insurance. Population aging may cause a small decline in rates of return. The main problem is the impact of population aging on public programs for the elderly.