Policy |
 |
Pension Projection Models |
Enhancements Introduced in Earlier Versions of the PSG Models (since 2004)
2008-Jun
Move GEMINI .xsa output file statistic
(22) from the supplementary to the core survey questions. Add
GEMINI .xsb and .xsc output files that have the same file layout
as the .xsa output file. Add field scnsid_ind to STATS table in
GEMINI input database with the new logical field controlling
whether individual or adult-equivalent-couple benefits and
earnings statistics are used to construct the statistics included
in the GEMINI .scn and .sid output files. Change GEMINI input
database parameter values used in the adult equivalents formula
in the RCS mode and ESP+ mode benchmark runs in order to make
statistic (41) in the GEMINI .sum output file a more conventional
denominator in retirement income replacement rates. Add SSASIM
.pfp output file, which contains annual values of PIA formula
parameters: the three bendpoints and four formula percents for
each of the three eligibility events. Add three
certainty-equivalent statistics to GEMINI .sid output file and
three certainty-equivalent statistics to GEMINI .scn output
file. Add sid_crra field to STATS table in GEMINI input database
for specifying the constant relative risk aversion (CRRA)
parameter in the expected utility function used to calculate the
new certainty-equivalent statistics. Add a new field to both the
BEND_DI and BEND_RI tables that allows a change in the method of
computing DI and OASI COLAs. Prior model versions always
computed annual COLAs using a CPI-indexing method, but now there
is the option to use an AWI-indexing method.
2008-May
Revise the source code of the PSG models
so that the core models and utilities &mdash but not the various
Toolkits &mdash can compile and execute under operating systems
other than Windows. So far, this has been done successfully for
Mac OS X (10.4+) and Debian 4.0 (32-bit) Linux. The purpose of
this work is to gain access to more powerful hardware platforms
such as the Mac Pro, which has eight Intel Xeon cores standard,
and cloud computing facilities that offer scores of quad-core
Linux servers for rent by the hour. Upgrade the Tcl interpreter
included with the PSG models to Tcl 8.5.2 version. Upgrade the
PSG models to SQLite 3.5.9 version. Add SSASIM INSURED table that
includes the main policy parameter that determines whether an
individual is "fully insured" for OASDI benefits. Provide a
PENSIM xsall utility that automatically combines the many
xs?NNNNN.YYY files produced during an OLC mode run into a single
xs?NNNNN.all file that represents a genuine cross-sectional
sample of individuals drawn at the survey moment during the
survey year. Add to PENSIM the ability to trace the life events
experienced by a spouse of a sample individual. Add to PENSIM
pension behavior the possibility that individuals cashout the
lumpsum equivalent of their vested benefits in career-earnings or
terminal-earnings defined-benefit plans when the job ends before
retirement, disability, or death. Add GEMINI .sid output file
that contains information on each sample individual used to
tabulate the scenario statistics contained in the .scn output
file, which allows calculation of statistics that measure the
variability of social security and pension benefits (a) across
stochastic scenarios, (b) across cohort individuals within each
scenario, and (c) across retirement years for each
individual.
2008-Apr
Add an embedded-SQL capability to the
RSF Toolkit's run specification language, which means that now
all parameters in the input databases of the PSG models can be
manipulated using the run specification language without having
to work directly with the databases. Add PENSIM .mig output file
that contains aggregate migration and population counts for the
simulated birth cohort. Revise PENSIM schooling logic and tables
so that native-born and foreign-born individuals can have
different educational attainment distributions. Revise the GEMINI
AAAF parameter so that it can be a negative number.
2008-Mar
Add ability to specify exemplary cohort
individuals (ECI) using the RSF Toolkit's run specification
language. Add to SSASIM input database "scaled earnings" profiles
derived by OCACT from 2007 Trustees Report assumptions. Add
PENSIM cross-sectional survey supplement 7 that contains
statistics that can be used to determine how many individuals
work beyond the age at which they are eligible for unreduced (or
normal) benefits from the defined-benefit plan covering them on
their current job; the new supplement to the PENSIM .xsa, .xsb,
.xsc output files has been used by DOL/EBSA in a regulatory
impact analysis.
2008-Feb
Revise the baseline PENSIM assumptions
concerning the transition probabilities between the
positive-annual-contribution state and the
zero-annual-contribution state using MINT5 estimation results.
Add PENSIM DBWITH1 table parameters to determine gender-specific
probabilities of a married individual choosing a single-life
annuity as the payout from a traditional defined-benefit pension
plan (rather than the default, under federal law,
joint-and-survivor payout); the new parameters are set to produce
probabilities tabulated from 1992-2000 HRS data shown in the
MINT5 final report. Add four earnings statistics to the GEMINI
.xsa output file.
2008-Jan
Provide a free educational version of
GEMINI and add the ESP+ mode benchmark run to the RSF Toolkit.
Add ability to define a range of earnings that is excluded from
OASDI taxable earnings, allowing specification of so-called
"donut-hole" payroll tax reform provisions.
2007-Dec
Add to EDA Toolkit a page containing the
numerical value of statistics that appear in the graph; make
several other improvements in the EDA Toolkit.
2007-Nov
Add immigration and emigration ages to
PENSIM .cov output file. Upgrade the PSG models to SQLite 3.5.2
version.
2007-Oct
No enhancements.
2007-Sep
Add disabled adult children to the PSG
models. Add recovery from disability as a life event in
PENSIM. Add zero-employer-matching savings-thrift plans to PENSIM
using custom tabulations of 1996-97 private-sector and 1998
public-sector Employee Benefit Survey data performed by BLS staff
at the request of EBSA. Add to GEMINI cross-sectional output
files (.xsa, .xsb, .xsc) new supplements that contain information
about beneficiary head counts using SSA beneficiary type
definitions. Perform a cross-model validation test comparing
beneficiary counts by benefit type in 2060 with estimates for
2060 in the Trustees Report, the results of which show that the
PSG models produce estimates that are close to those of OCACT
(except in the case of adult SI beneficiaries where the OCACT
estimates seem too high given the upward trend in female labor
force participation rates).
2007-Aug
No enhancements.
2007-Jul
Add to PENSIM cross-sectional output
files (.xsa, .xsb, .xsc) a set of supplementary questions that
produce statistics that can be compared to SCF data on
defined-contribution balances. Begin adding logic and output
statistics for zero-employer-matching savings-thrift plans, which
are soon to be introduced into PENSIM. Improve the realism of the
Markov process that determines annual transition probabilities in
to and out of the state of defined-contribution participants
making a zero annual contribution. Calibrate employer
probabilities of offering different types of pension plans over
the 1975-2005 period using publicly available data. Conduct two
validation tests of PENSIM estimates of defined-contribution
account balances using 2004 SCF data and 2005 data from the
EBRI-ICI 401(k) database, and describe the validation test
results in the PENSIM Overview.
2007-Jun
Provide a run specification file for a
CBA mode run that produces stochastic results similar to those in
the 2007 Trustees Report. Upgrade the PSG models to SQLite 3.4.0
version. Revise the effect of PENSIM INDBEHX retirement delay so
that nobody delays retirement beyond age seventy. Add three sets
of supplementary questions to core survey questions in the GEMINI
.xsa output file.
2007-May
Add new PSG models benchmark runs that
use 2007 Trustees Report intermediate-cost assumptions. Change
the compiler collection used to build the PSG models from Open
Watcom to GNU running under MinGW; the resulting models are
slightly larger, but run noticeably faster: one-thousand scenario
CBA mode runs are roughly the same speed, OLC mode runs are about
twenty-five percent faster, and RCS mode runs are almost thirty
percent faster. Add a supplement 5 to the three PENSIM
cross-sectional survey output files (.xsa, .xsb, .xsc) that is a
March-CPS-style prior-year-retrospective survey on annual
earnings and annuity transactions. Add to PENSIM an exemplary
cohort individual account saving feature that simulates account
contributions, returns, and balance for a single individual,
allowing PENSIM to generate simple projections of one individual
for comparison with results from other studies (see, for example,
the wildly misleading results in the CRS report by P. Purcell and
D. Whitman, "Retirement Savings: How Much Will Workers Have When
They Retire?" January 2007). Revise the GEMINI AAAF feature so
that the annual actuarial adjustment factor can vary in value
across calendar years. Add GEMINI .xsa output file that can be
used to generate multiple-cohort cross-sectional survey output
for a specified calendar year when GEMINI is operating in OLC
mode.
2007-Apr
Change the database technology used by
each PSG model so that the hundreds of Microsoft FoxPro files are
replaced with a single-file SQLite database. Provide as part of
the PSG models installation a Tcl language interpreter
(tclkitsh.exe) as well as a Tcl SQLite dynamic link library
(tclsqlite3.dll) so that any user can directly manipulate the
model databases if the RSF Toolkit run specification language is
not sufficient. Add a backup button to the RSF Toolkit. Add
social security COLA offset reform to the list of reform
provisions available in the RSF Toolkit Build interview. Add a
tkprefs file that allows users to specify preferences about the
Toolkits: the folder where backups are placed, the Trustees
Report year, and the size of the Toolkit window and fonts. Add to
PENSIM .pen output file a statistic that reports the couple's
end-of-the-year rollover account balance. Add to the PENSIM .cov
output file four statistics that report the number of years the
individual held full-time jobs, held part-time jobs, was eligible
for a defined-benefit pension plan, and was eligible for a
defined-contribution pension plan. Add PENSIM INDBEHX table that
contains individual behavior parameters are in the scope of the
RSF Toolkit run specification language.
2007-Mar
Add to SSASIM AIME table five policy
parameters that allow the specification of social security
caregiver credit reforms. Add to the RSF Toolkit several new
convenience features: multiple run specification file use, find
and replace in all run specification files, and renaming of run
specification files. Add to PENSIM cross-sectional survey output
file a fourth optional supplement that focuses on pension
eligibility and vesting a recent job endings. Add to the PENSIM
DBVEST table four new parameters that allow the specification of
maximum cliff vesting years across all defined-benefit pension
plans, with the maximum possibly being different in the private
and public sectors and/or possibly being implemented in different
years. Add to the PENSIM DCVEST table four new parameters that
allow the specification of maximum years to cliff vesting and
maximum years to full graded vesting across all
defined-contribution pension plans, with the maximum possibly
being implemented in different years. Add PENSIM .age output file
that contains selected individual statistics at each age in a
specified age range. Add to the PENSIM .cov output file several
statistics describing the longest job held by the individual.
Add to PENSIM ASSETS table a so-called stable-value fund, revise
the pension account asset-allocation (ACCTAA?) tables to allow
investment in stable-value funds, and revise the cross-sectional
survey output to include holdings of stable-value funds. Add to
the PENSIM STAENR1 table an additional parameter having to do
with automatic enrollment in defined-contribution pension
plans. Add to PENSIM PAINVS table new parameters that allow the
characterization of an "endorsement effect" caused by the
selection of a default investment under automatic enrollment. Fix
a bug in the out2bage utility inadvertently introduced by the
source code changes made during February 2007.
2007-Feb
Add SSASIM and GEMINI trace output that
confirms that negative PIA reductions at DI-to-OAI conversion are
not applied in reforms that would appear to call for such
reductions; this substantive change in logic was implemented in
January of 2007. Extensively revise the source code of the PSG
models to make the code more like C and less like C++,
particularly with regard to string formatting and file reading
and writing; the source code continues to use fundamental C++
features such as classes, templates, and inheritance. Add roughly
two hundred tables in the PENSIM input database to the scope of
the RSF Toolkit run specification language. Add the GEMINI TRACE
table to the scope of the RSF Toolkit run specification
language.
2007-Jan
Provide for the first time to the public
a full-featured version of PENSIM that can simulate
employer-sponsored pension accumulation and withdrawal. Revise
the logic used to compute the maximum taxable earnings (MTE)
level from the average wage index (AWI) so that it mimics more
closely the actual administrative calculation.
2006-Dec
Revise the TFS Toolkit so that annual
values of the income and cost rate are connected by lines if they
are drawn from an actual scenario (rather than representing
percentile values, which typically come from different scenarios
each year). Provide a resce utility that computes the
certainty-equivalent value of the distribution of an output
statistic using either expected utility theory or cumulative
prospect theory. Add to PENSIM a third cross-sectional survey, so
that now up to three different cross-sectional surveys can be
conducted in a single ESP mode run.
2006-Nov
Add to the RSF Toolkit Build interview
the option of specifying an employer-sponsored pension (ESP) mode
run, in anticipation of the public distribution of a
pension-simulating version of PENSIM. Provide a Trust-Fund
Solvency (TFS) Toolkit that produces a one-page summary that
contains several solvency statistics and a time-series graph that
shows income and cost rates in either deterministic or stochastic
CBA mode or OLC mode runs. Add longevity indexing of the minimum
PIA base amount in the SSASIM MINPIA table. Add to PENSIM a
second cross-sectional survey, so that now up to two different
cross-sectional surveys can be conducted in a single ESP mode
run.
2006-Oct
No enhancements.
2006-Sep
Add to the RSF Toolkit the ability to
see input database table values used by the base run by clicking
a run specification language statement for a table with the right
mouse button. Streamline the specification of spouses and kids in
ECI mode runs and revise the ECI Toolkit to work with the new
structure of the SSASIM input database tables. Add equity return
and Treasury bill spread to the set of key SSASIM assumption
variables, revise the run specification language to handle the
new assumption variables, and revise several SSASIM output files
to report their annual values. Add ability to make a one-time
change in the wage-indexed level of minimum earnings required to
earn a social security quarter of coverage. Add several PENSIM
input database tables that allow more detailed specification of
assets that can be held in pension accounts.
2006-Aug
No enhancements.
2006-Jul
Revise the RSF Toolkit in several ways
and make it the standard interface to the PSG models. Provide an
Exemplary Cohort Individual (ECI) Toolkit that automates
extraction of output statistics to an Excel spreadsheet. Add a
new employer-sponsored pension (ESP) mode of operation to the PSG
models in anticipation of the public release of a
pension-simulating version of PENSIM. Add to the EDA Toolkit the
ability to create two-dimensional color histogram graphs that
visualize the joint distribution of two continuous GEMINI output
statistics.
2006-Jun
Provide a run specification file for a
CBA mode run that produces stochastic results similar to those in
the 2006 Trustees Report. Provide an Exploratory Data Analysis
(EDA) Toolkit for tabulating and graphing statistics from GEMINI
output files. Add GEMINI .cpi output file containing annual
values of the CPI index. Revise the out2bage utility used by the
EDA Toolkit to generate .bAA output files so that it uses the
.cpi output file to convert nominal dollar amounts into real
dollar amounts. Add to GEMINI .sum output file two "level
earnings" statistics that are suitable denominators for
individual and couple replacement rates.
2006-May
Update SSASIM HISTORY and HISTMDR tables
with statistics for recent years and add new HISTMR table, so
that now the last historical year in PSG model simulations is
2004 instead of 1997. Provide a run specification file for a
CBA mode run that produces stochastic results similar to those in
the 2005 Trustees Report. Add PSG model benchmark runs that use
intermediate-cost assumptions from the 2006 Trustees Report. Add
low benefits-plus-earnings avoidance rate statistic to the GEMINI
.sum output file.
2006-Apr
No enhancements.
2006-Mar
Add options for SSASIM to produce .sti
and .sto output files in OLC mode runs. Improve logic of DI-to-OAI
conversion for cohorts with fractional normal retirement ages,
producing a smoother flow of beneficiaries from DI to OAI during
years when the normal retirement age is increasing by a fraction
of a year. Fix a bug in the calculation of PIA for individuals
who experience a disability or death event after age 62 and
before the retirement event. Add to SSASIM "scaled earnings"
calculated by OCACT using 2005 Trustees Report assumptions.
2006-Feb
No enhancements.
2006-Jan
Upgrade to a newer version of the Open
Watcom C++ compiler to build the PSG models, resulting in roughly
a ten percent reduction in run execution time. Change the run
specification file PENSIM preamble generated by the RSF Toolkit
so that there is no emigration of foreign-born individuals, which
is a highly unrealistic assumption, but one that aligns the PSG
models with assumptions made in the Trustees Report and in the
CBO CBOLT model.
2005-Dec
Revise PENSIM so that it directly writes
binary coh files in the OLC and RCS modes of operation. Add
OLC mode logic to PENSIM that forces immediate death of cohort
sample individuals and their spouses in the year following the
last simulation year in SSASIM. These two changes in the PSG
models have no effect on output results, but reduce the execution
time for an OLC run by about fifty percent. Fix a bug in the
calculation of enhanced PIA (as in the CSSS reform proposals) and
the minimum PIA (as in the Graham reform proposal) that was
caused by assuming quarters of coverage are counted back to age
21 instead of age 22 (as in those reform proposals). Fix a bug in
the calculation of minimum PIA for DI beneficiaries being
converted to retired-worker beneficiaries under the Graham
minimum PIA reform provision. Add GEMINI .scn output file
containing aggregate statistics for the cohort sample in each
scenario.
2005-Nov
Add a policy parameter that allows the
maximum social security account contribution rate to vary over
time.
2005-Oct
Add ability to specify (deterministic or
stochastic) macrodemographic and macroeconomic assumption
parameters using the run specification language in the RSF
Toolkit. Add statistics to SSASIM .pod output file that report
the age composition of the population. Add aggregate taxable
earnings to the SSASIM .ben output file.
2005-Sep
Continue developing the RSF Toolkit,
which will eventually become the user interface to the PSG
models. Add policy parameter that enable specification of reforms
that involve the scaling down of PIA-formula fractions for the DI
eligibility event in a way that differs by eligibility age, by
calendar year, and by formula fraction (i.e., in a "progressive"
manner).
2005-Aug
No enhancements.
2005-Jul
Provide the first, incomplete version of
the RSF Toolkit, which will serve as the new interface to the PSG
models, providing the ability to specify a new model run using a
simple run specification language without having to manipulate
the model input databases by hand. Add several policy parameters
to allow specification of reforms that establish non-linear
excess payroll tax rate schedules.
2005-Jun
Add policy parameters that enable
specification of reforms in which the bottom two and the top two
OASDI PIA fractions decline at different rates (i.e., the
"progressive indexing" of benefits). Add a policy parameter that
allows specification of reforms in which disabled-worker
beneficiaries are not converted to retired-worker beneficiaries
at their normal retirement age. Add a policy parameter that
allows specification of reforms in which disabled workers are not
allowed access to DI benefits, and must take reduced early
retirement benefits, if their age is greater than or equal to the
early retirement age. Improve the resclean utility so that it
automatically detects output files to delete in all three PSG
model working directories.
2005-May
Introduce automatic installation and
version upgrade capabilities. Provide initial version of the
dbrun-create utility that automates some aspects of creating a
new run in the PSG model input databases; this requires some
revisions to the structure of the several SSASIM tables. Correct
a bug that read the fraction of newborns who are girls as an
integer rather than a real value.
2005-Apr
Add benchmark runs to the PSG model
input databases that incorporate intermediate-cost assumptions
from the 2005 Trustees Report. Streamline the specification of
spouses and children of exemplary cohort individuals (ECI) in the
SSASIM input database. Add a statistic to the SSASIM .pod output
file that reports the population aged 65 or more in each
simulation year. Add to PENSIM the ability to reset all random
number streams at the start of each scenario, which permits
simulating the exact same sample of cohort individuals in each
scenario (when the reset parameter is true) or a different sample
of cohort individuals in each scenario (when the reset parameter
is false); the later is more reliable because there is no chance
that the single scenario sample is statistically unrepresentative
of the cohort population.
2005-Mar
Revise PSG model logic so that it is
possible to specify an OLC mode run that has as many as 900 years
in the actuarial test period (rather than the 75 years used in
the Trustees Report). Simplify the specification of exemplary
cohort individuals (ECI) in the SSASIM input database using OCACT
"scaled earnings" as the default earnings history. Add a new OASI
and DI payroll tax rate parameter that allows taxation of
earnings above the maximum taxable earnings (MTE) without using
the above MTE earnings in OASDI benefit calculations. Add new
social security account policy parameter that allows a positive
contribution rate on earnings above the MTE. Provide a
command-line dbrun-delete utility that deletes from model input
databases all rows used by the specified run that are not used by
any other runs. Provide a command-line hist2d utility that
produces two-dimensional histogram graphs from GEMINI output
files.
2005-Feb
Streamline the specification of social
security accounts in several ways. Add new DI policy parameter
that allows specification of Graham reform proposal for DI PIA
calculation when PIA fractions are declining. Revise the
assumption about the timing within a calendar year of the payment
of OASDI taxes and the receipt of OASDI benefits so that
cashflows are assumed to occur at the start of the year, bringing
the micro ECI and RCS modes of operation into line with the
assumptions used in the macro CBA and OLC modes of operation. Add
a GEMINI annuity provider revenue and cost output file that
reports the solvency of the social security account annuity
provider, which provides statistics needed to determine the
pricing of annuities that will ensure the solvency of the
provider.
2005-Jan
Add a fourth automatic adjustment method
for the OASDI PIA formula fraction that sets this year's fraction
equal to last year's fraction, which allows reforms that stop
benefit "indexing" in some future year. Simplify the modeling of
social security account clawbacks. Improve the logic used to
estimate trust-fund income produced by the income taxation of
social security benefits. Revise PENSIM job-start logic so that
individuals never start a new job late on New Year's Eve. Add two
statistics to the GEMINI .sum output file that report the
lifetime present value of OASI and DI benefits received from the
DB tier of social security.
2004-Dec
Add DI-to-OAI conversion logic option
required to characterize the Graham proposal. Add two new
statistics to the GEMINI .sum output file that record the age at
which the first OASDI benefit is received and the dollar amount
of that first benefit.
2004-Nov
Add ability to specify various automatic
adjustments (or "indexing") methods for the fractions used in the
OASDI PIA formula, which allows easier specification of the CSSS
reform proposals and correct simulation of CSSS plan 2 under
stochastic assumptions that imply variation in real wage growth
across macroeconomic scenarios. Add ability of not applying the
minimum PIA policy to PIA calculations at the disability event,
which allows that specification of the minimum PIA policy
contained in the Graham reform proposal.
2004-Oct
No enhancements.
2004-Sep
Add ability to increase the number of
dropout years in the OASDI AIME formula, which adds flexibility
to the longstanding ability to reduce the number of AIME dropout
years. Add ability to specify a nonlinear minimum PIA formula as
in the most recent Kolbe-Stenholm bill (see OCACT memo dated
2/11/04). Add ability to specify a maximum retired-worker spousal
benefit as in the most recent Kolbe-Stenholm bill. Add to the
PSG models distribution two new output analysis utilities, mean
and pctiles, that quickly tabulate at the Windows command prompt
the mean and percentile distributions of any statistic in GEMINI
.sum and .bAA output files.
2004-Aug
No enhancements.
2004-Jul
No enhancements.
2004-Jun
Add new PSG model benchmark runs that
use 2004 Trustees Report intermediate-cost assumptions.
2004-May
Add to the binary env file generated by
SSASIM for PENSIM input OASDI statistics required for
offset-integration benefit calculation logic for some
defined-benefit pension plans. Add to the GEMINI .sum output file
a second OASDI internal rate of return statistic so that the old
statistic is computed using individual tax and benefit cashflows
and the new statistic is computed using family-size-adjusted
couple tax and benefit cashflows. Add age of disability onset
and age of disability recovery to GEMINI .bAA output file.
2004-Apr
No enhancements.
2004-Mar
Change the assumption used in
calculating summarized cost rates, summarized income rates, and
the actuarial balance, concerning the timing of cashflows within
each calendar year. Prior versions of SSASIM assumed that
cashflows involved in the calculation of these present value
statistics occur at the end of the calendar year. But Trustees
Report Table IV.B6, which appeared for the first time in the 2003
report (see page 61), implies that the Office of the Chief
Actuary assumes that the cashflows occur at the beginning of each
calendar year in these present value calculations. The same
within-year timing assumption is made beginning with this version
of SSASIM. This change in present-value-calculation logic causes
small changes in the summarized rates.
2004-Feb
Add SSASIM .ben output file that
contains annual OASI and DI beneficiary head counts as well as
annual values of the SSA average wage index (AWI), the CPI index,
and OASDI maximum taxable earnings (MTE). Update PENSIM input
parameters so that OLC mode runs use 2003 Trustees Report
intermediate-cost assumptions same as CBA mode runs. Add ability
to specify whether or not GEMINI computes an OASDI internal rate
of return statistic for each individual, and whether or not the
cashflows used in the calculation are individual or couple taxes
and benefits. Add to GEMINI an annual actuarial adjustment factor
(AAAF) to enable OLC mode runs using 2003 Trustees Report
intermediate-cost assumptions to simulate aggregate future
benefits that are as high as reported in the 2003 Trustees
Report. The AAAF feature allows users to either use standard
microsimulation methods and get lower benefits (as in the CBO
CBOLT model) or to use the AAAF to emulate the higher benefit
shown in the 2003 Trustees Report.
2004-Jan
Add features to support new OLC mode of
operation, including a SSASIM population detail .pod output file,
and immigration and emigration behavior in PENSIM. Add new OAI
policy parameter that controls size of auxiliary child benefits
so they can differ from auxiliary spouse benefits. Add present
value of taxable earnings statistics to SSASIM .ssa output file.
Add statistics to GEMINI .sum output file that adjust couple
benefits, taxes, and earnings for family size, using two
user-defined parameter values and a family size equivalence
formula from a 1995 National Academy of Sciences report. Add
this family size equivalent statistic to the GEMINI .adq output
file.
This page was last revised on July 30, 2008.