### Greenspan Commission

**Appendix I**

**GLOSSARY **

__Average Indexed Monthly Earnings (AIME)__ -- The earnings used to
determine the Primary Insurance Amount, on which benefits for a worker
and family will be based. Earnings for each year after 1950 are updated
(indexed) to the indexing year (the second year before the year in which
the worker becomes age 62 or, if earlier, becomes disabled or dies) to
take account of the increase in average wages since the year that they
were earned. Earnings for the indexing year and subsequent years are used
at their actual values. Then, the highest years of indexed earnings for
a specified number of years are selected and averaged to yield the AIME.

__Primary Insurance Amount (PIA)__ -- The amount on which all monthly
OASDI benefits are based. A worker's PIA is derived from Average Indexed
Monthly Earnings by applying it in a weighted benefit formula. Such formula
for persons reaching age 62 in 1983 (or dying or becoming disabled before
age 62 in 1983) is 90% of the first $254 of AIME, plus 32% of the next
$1,274 of AIME, plus 15% of AIME in excess of $1,528. For persons attaining
age 62 in subsequent years, the dollar figures are changed to reflect
relative changes in nationwide average wages. A worker's disability benefit
or old-age benefit at age 65 is equal to 100% of PIA. Other benefits are
various percentages of the worker's PIA.

__Maximum Family Benefit__ -- The maximum monthly amount that can
be paid on a worker's earnings record. Whenever the amount of benefits
payable on an earnings record exceeds the maximum, each auxiliary or survivor
benefit is proportionately reduced to bring the total within the maximum.
(Benefits for divorced spouses and surviving divorced spouses are excluded
from this limit.)

__Replacement Rate__ -- The worker's benefit (or the family benefit)
as a percentage of prior earnings. If a worker earned $500 a month before
retirement and receives a benefit of $350, the replacement rate is 70%.

Generally, the replacement rate is the relationship between the annual
benefit rate payable for the first month of entitlement and the gross
taxable earnings for the year before entitlement. However, in some contexts,
it may be the relationship between the benefit and net after-tax earnings
for the prior year. (In other contexts, the benefits payable for the first
full year of entitlement, including any CPI increase for June and thereafter,
are used as the numerator.)

__Bend Points__ -- The points in the PIA benefit formula at which
the percentage factor that is applicable to the AIME changes. For example,
in the formula for those reaching age 62 in 1983, these points are $254
and $1,528. The percentages applicable are 90%, 32%, and 15%. When developing
the formula for persons attaining age 62 in subsequent years, the percentages
remain constant, but the dollar figures are changed to reflect relative
changes in nationwide average wages.

__Trust-Fund Ratio__ -- The trust-fund balance expressed as a percentage
of total outgo during the next 12 months.

__Cost Rate__ -- The outgo for benefits and administrative expenses
for a year expressed as a percentage of the payroll that is taxable for
Social Security purposes for that year.