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Health Services Research Work Force and Educational Issues (1995) / Chapter Skim
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Appendix C: Multistate Life Table Methodology and Projections
Pages 113-120

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From page 113...
... Multistate life tables, an extension of basic life tables, allow greater complexity to enter the analysis: people can enter as well as exit a population and can move back and forth across a variety of states within a population. Life 'This originally appeared as Appendix G in the National Research Council report Meeting the Nation 's Needsfor Biomedical and Behavioral Scientists.
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From page 114...
... Individuals are followed until they reach a certain cutoff point that depends on the survey year at which they entered "typically 42 years after the Ph.D., although in recent SDR waves, they are followed until they reach age 70 or until they drop out for other reasons (nonresponse or deathly. The form of the data on which the life tables are based consists mostly of large sets of transition tables constructed from the SDR by National Research Council (NRC)
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From page 115...
... These transition data sets constructed by NRC staff were transformed into proportions to be used as input into a Multistate Life Table program (Tiemeyer and Ulmer, 1991~. Initial work involved explorations of data quality, sample sizes, and the stability of rates over time.
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From page 116...
... employed "in field" population size for any given year is: Target "In Field" Population Size (y) = Flggl .(l +G3y 1991 Then the target Let Dx represent the proportionate distribution by age and state of new entrants to the specified Ph.D.
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From page 117...
... \J [d,o] R ((S Dxjx~ where I is a k by k identity matrix, S is a k by 1 vector of ones, and the symbol x designates an element-wise matrix multiplication operation.
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From page 118...
... To illustrate the use of life table analysis in generating projections of workforce variables, the Panel, as an exploratory exercise, chose to generate estimates of job openings. Given the uncertainty associated with efforts to project demand, the Panel examined three growth rates scenarios based on the average annual growth in the biomedical arid behavioral science workforces between 1981 and 1991: zero growth; one-half the 1981-1991 average annual growth; and the average annual growth.5 Estimates of "net separations"6 were generated using the life tables.
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From page 119...
... field" and those who are out of labor force, retired, or out of the country could be missing employment field and "work activity." 5. The 1981-1991 average annual growth rates were: 4.25 percent per year for the biomedical sciences workforce and 3.5 percent per year for the behavioral sciences workforce.
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From page 120...
... Notional Research Council. Forthcoming.
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Key Terms

  • life tables
  • multistate life
  • employment fields
  • labor force
  • transition proportions

  • job openings
  • destination state
  • transition rates
  • period life
  • origin state

  • age distribution
  • current population
  • proportionate distribution
  • biennial transition
  • biomedical employment

  • career patterns
  • behavioral employment
  • transition table
  • age x
  • work activity

  • table analysis
  • death rates
  • employment field
  • organizing various
  • distributed approximately

  • minus gains
  • workforce variables
  • decision rules
  • distribution observed
  • conventionally referred


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