Return to PSG Models documentation page

GEMINI output file .SID

--- .SID file contains individual statistics for each scenario statistic 
         in .scn file.

Read the documentation of the GEMINI runNNNNN.scn file before reading below.

The GEMINI runNNNNN.sid file has no heading lines and no summary lines.
There is one line for each individual tabulated in the .scn statistics.
The individual statistics on a line are separated by the tab character.

Definitions:
The individual statistics included in the .sid file for a scenario should
  add up (using retirement years as the weights for dollar amounts) to the
  aggregate scenario statistics in the .scn file.
Consult documentation of .scn and .adq and .sum output files for more details.

The individual statistics on each line are as follows:
( 1) scenario number
( 2) gender: 0 ==> male, 1 ==> female
( 3) number of retirement years
( 4) mean real AWI (averaged over all retirement years for individual)
( 5) mean pretax RRI (averaged over all retirement years for individual)
( 6) mean pretax OASDI benefit (a component of mean RRI)
( 7) mean pretax pension benefit (a component of mean RRI)
( 8) steady indexed earnings (sum:40 or sum:41 depending on scnsid_ind)
( 9) first age in retirement-years range (as defined in the .scn output file)
(10) certainty-equivalent pretax RRI (see note below on method)
(11) certainty-equivalent pretax OASDI benefit (see note below on method)
(12) certainty-equivalent pretax pension benefit (see note below on method)
(13) pretax RRI at last retirement age (i.e., in final year of life)
(14) pretax OASDI benefit at last retirement age (i.e., in final year of life)
(15) pretax pension benefit at last retirement age (i.e., in final year of life)
(16) pension rollover account balance at death when have no surviving spouse
     Note that (16) equals (sum:20) when (sum:22) equals zero
                                         (i.e., there is no surviving spouse)
           and (16) equals zero     when (sum:22) equals one
                                         (i.e., there is a surviving spouse)  
     where balance is expressed in thousands of SSASIM:COHORT.cpi_year dollars.
(17) number of retirement years in which RRI is zero

So, (5)=(6)+(7) for each individual, apart from rounding error.
Also, (13)=(14)+(15) for each individual, apart from rounding error.
But (10) is not necessarily equal to (11)+(12) because of method (see below).

Method for Calculating a Certainty-Equivalent Amount
Standard expected-utility-theory methods are used with the addition of a 
special rule to handle the retirement years with zero amounts.  A constant
relative risk aversion (CRRA) utility function is assumed with the crra
parameter value being set by the scnsid_ra field in the STATS table of the
GEMINI input database.  The certainty-equivalent amount for years in which
there are positive amounts is computed as the certain amount whose utility
is equal to the expected utility of the annual positive amounts.  If there
are years with zero amounts, the positive-years certainty-equivalent amount
is multiplied by the ratio of the number of positive-amount years to the
total number of retirement years.