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INTRODUCTION 6 that is implemented with personal computing technology. It was developed by Statistics Canada in the late 1980s; see Statistics Canada (1989). Transfer Income Model 2 (TRIM2) TRIM2 is a static model of government tax and transfer programs, including AFDC, SSI, food stamps, school nutrition programs, Medicare, employer-sponsored health insurance, Medicaid, federal income taxes, state income taxes, and social security payroll taxes. The original TRIM was developed by the Urban Institute in the early 1970s; see Webb et al. (1982) and Webb et al. (1986). REFERENCES Doyle, Pat, Trippe, Carole, Huff, Ann, and Coffin, Kirsten, eds. 1990 MATH Technical Description: Current Services Files. Washington, D.C.: Mathematica Policy Research, Inc. Havens, John, and Clayton-Matthews, Alan 1989 The MRPIS Model: Notes for Presentation to Committee on National Statistics. Paper prepared for the Panel to Evaluate Microsimulation Models for Social Welfare Programs. Social Welfare Research Institute, Boston College, Chestnut Hill, Mass. Johnson, Jon, and Zedlewski, Sheila R. 1982 The Dynamic Simulation of Income Model (DYNASIM). Vol. II, The Jobs and Benefits History Model. Washington, D.C.: The Urban Institute Press. Johnson, Jon, Wertheimer, Richard, and Zedlewski, Sheila R. 1983 The Dynamic Simulation of Income Model (DYNASIM). Vol. I, The Family and Earnings History Model. Washington, D.C.: The Urban Institute Press. Kennell, David L., and Sheils, John F. 1986 The ICF Pension and Retirement Income Simulation Model (PRISM) with the ICF/Brookings Long-Term Care Financing Model. Draft technical documentation. ICF, Inc., Washington, D.C. Kennell, David, et al. 1988 Financing of Long-Term Care. Final report submitted to the Assistant Secretary for Planning and Evaluation, U.S. Department of Health and Human Services. Washington, D.C.: Lewin/ICF, Inc. Lewin/ICF, Inc. 1988 The Household Income and Tax Simulation Model (HITSM): Methodology and Documentation. Washington, D.C.: Lewin/ICF, Inc. Lewis, Gordon H., and Michel, Richard C., eds. 1990 Microsimulation Techniques for Tax and Transfer Analysis. Washington, D.C.: The Urban Institute Press. Social Welfare Research Institute No date Multi- Regional Policy Impact Simulation (MRPIS) Model, Level 3.0: Analyst's Guide. Boston College, Chestnut Hill, Mass. Statistics Canada 1989 SPSD/M Introductory Manual. Ottawa: Statistics Canada.
INTRODUCTION 7 Webb, Randall L., Hager, Clara, Murray, Douglas, and Simon, Eric 1982 TRIM2 Simulation Modules. 2 vols. (AâM and NâZ). March 1982 plus updates. Washington, D.C.: The Urban Institute Press. Webb, Randall L., Bergsman, Anne, Hager, Clara, Murray, Douglas, and Simon, Eric 1986 TRIM2 Reference Manual: The Framework for Microsimulation. Working Paper 3069â091. Washington, D.C.: The Urban Institute Press.