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Improving Information for Social Policy Decisions -- The Uses of Microsimulation Modeling Volume II, Technical Papers (1991) / Chapter Skim
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Pages 179-184

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From page 179...
... The Urban Institute work included creating a new TRIM2 database from the current March CPS data file, modifying the current operating characteristics to match current legislation or ASPE-proposed scenarios, and general model maintenance. Approximately 80 percent of the money was for routine TRIM2 model development and maintenance, and 20 percent was for using and interpreting the model for policy analysis.
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From page 180...
... In many cases large model runs must be submitted for overnight execution. The only interactive facilities available to the TRIM2 analyst or programmer are the interactive edit facilities used to prepare the TRIM2 JCL and control cards.
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From page 181...
... The IBM Assembler language input and output routines would have to be replaced and the FORTRAN source code adapted for use with the target system's FORTRAN compiler. The SPS D/M user interface could be adapted to a graphical user interface such as Sun's Open Look with approximately 2 person-months of time.
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From page 182...
... · Extensibility No microsimulation modeling system can anticipate all future user requirements. Both SPSD/M and TRIM2 include a rich set of parameters to control the basic operation of the model and the individual simulation modules.
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From page 183...
... TRIM2 is currently used nearly exclusively by the technical programming staff at the Urban Institute. No outside researchers are attempting to enhance the model by modifying the internal FORTRAN source code.
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From page 184...
... The original TRIM2 design was based on the premise of using the self-defining active file as both an input and an output file; thus, this facility provides a much more powerful generalized form of result file. Again, a contrast can be seen in the overall approach of designing a microsimulation system.
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Key Terms

  • operating characteristics
  • master routine
  • march cps
  • active file
  • graphical user

  • source code
  • user interface
  • master routines
  • user interfaces
  • statistics canada

  • model run
  • urban institute
  • simulation module
  • simulation modeling
  • model runs

  • operating characteristic
  • mainframe computer
  • simulation modules
  • microsimulation model
  • control cards

  • input data
  • cps data
  • consumable income
  • result file
  • development environment

  • program change
  • software development
  • transfer program
  • execution time
  • disk space


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