GEMINI
- a dynamic microsimulation model for analyzing the lifetime
implications of social security policies for a large sample of
people born in the same year
- initial development funded exclusively by the Policy
Simulation Group during 2000 and 2001
- uses as input birth cohort samples generated by
PENSIM so as to represent
the demographic and economic characteristics of
historical birth cohorts
- incorporates same kind of OASDI program logic (including
individual accounts) as used in the micro model of
SSASIM, with almost all assumption
and policy parameters read from a SSASIM input database
- produces output files that contain detailed information
about the life events and annual OASDI program experience of each
individual in the cohort sample used as input
- current version of the model produces these detailed output
files for a cohort sample of 100,000 life histories (plus spouses
and children) in about two minutes on a fast personal computer
- for an example of the use of GEMINI output in social
security policy analysis and a comparison of GEMINI and MINT
estimates, see the GAO adequacy study for the Ways and Means
subcommittee on social security (GAO-02-62, November 2001)
- introductory information is in a short document:
Getting Started with the PSG Models
(psghelp.pdf);
more detailed information is in GEMINI Guide
(guide2.pdf)
- more information on the GEMINI output visualization
capability is available in Getting Started with the EDA
Toolkit (edahelp.pdf)
Complete GEMINI Installation Package for Windows 2000/XP
- required first step is to install PENSIM
- important installation details and version differences are
explained in Getting Started with the PSG Models
(psghelp.pdf)
- free educational version of GEMINI requires no registration or
subscription fee, but has a major limitation
- standard version of GEMINI requires registration and
subscription fee
- complete installation package for 5/12/08
educational or standard version:
install-GEMINI.exe
Recent GEMINI Upgrade Packages for Registered SSASIM Users
Who Already Have Complete GEMINI Installation
- upgrade package is not a complete installation
- upgrade instructions sent via email
- upgrade packages for versions dated:
2/27/08
3/26/08
4/17/08
5/12/08
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