whom Social Security is the primary source of retirement income; those at moderate incomes, for
whom expanding access to retirement saving vehicles and encouraging saving through those
vehicles could raise retirement preparedness; and those at the highest income levels, for whom
the private sector defined contribution structure provides a range of opportunities for saving.
The study of pension policy by Nicholas Barr and Peter Diamond (2008) illustrates the many
tradeoffs that policy-makers must confront in designing both public retirement support programs
and the retirement saving structures that complement them, and illustrates these tradeoffs with a
range of country studies.
One of the consequences of the aging U.S. population that can be predicted with near
certainty is the continuing demand for analysis of the economic effects of this demographic shift.