The Journal of Population Studies
Online ISSN : 2424-2489
Print ISSN : 0386-8311
ISSN-L : 0386-8311
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Volume 36
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  • Household Simulation 2004 through INAHSIM
    Tetsuo FUKAWA
    Article type: Article
    2005 Volume 36 Pages 1-12
    Published: May 31, 2005
    Released on J-STAGE: September 12, 2017
    DOIhttps://doi.org/10.24454/jps.36.0_1
    JOURNAL FREE ACCESS
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    INAHSIM (Integrated Analytical Model for Household Simulation) is a micro simulation model, which was first developed in 1984-85 by a multi-disciplinary research group. INAHSIM 1985 used an actual initial population and a set of transition probabilities derived from the vital statistics and national sample surveys. Among several attempts to improve the simulation model since 1985, a new application of the model was made in 1993-95, which was called 1994 Simulation. In this INAHSIM 1994, initial population of the model was prepared by using the simulation model itself. In this way, it was confirmed that INAHSIM was applicable when initial population was not available from census or national household surveys. INAHSIM 2004 has been conducted further improving the creation process of the initial population initiated in 1994 Simulation as well as adding physical status of the elderly in the model. In this paper, we verify the usefulness of the outputs from INAHSIM 2004. It turned out to be very important to connect the household situation and physical status of the elderly. The household situation of the children is a basic information for a well-defined child care support policy. A weighted parent-child ratio is an index of elderly care, and the usefulness of such index increases through incorporating the physical status of the elderly. The dynamic transition of households is always a good example of the predominant features of micro-simulation model. In order to analyze family life cycle, it is necessary to improve the accuracy of various transition probabilities on household mergers. In short, the outputs of the INAHSIM are not limited to the information on the future number and composition of households. The INAHSIM provide us, among others, information on dynamic transition of households, effects of family systems to the number and structure of households, and household situations of individuals with specific attributes.
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