How Managed Care Affects Medicaid Utilization: A Synthetic Difference-in-Difference Zero-Inflated Count Model

D.A. Freund, T.J. Kniesner, A.T. LoSasso

    Research output: Working paperDiscussion paperOther research output

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    Abstract

    We develop a synthetic difference-in-differences statistical design to apply to experimental data for adult women living in Hennepin County, Minnesota, to estimate the impact of Medicaid managed care on various modes of medical care use.Because the outcomes of interest are utilization counts with many persons using none of a particular mode of care we use count regression models that are adjusted for excessive zeros.We find no reductions in physician visits or hospital inpatient and emergency department care use, but reductions in hospital outpatient care.Simulations designed to judge the economic significance of our results suggest a program effect that is a savings of about ten percent.
    Original languageEnglish
    Place of PublicationTilburg
    PublisherEconometrics
    Number of pages44
    Volume1996-40
    Publication statusPublished - 1996

    Publication series

    NameCentER Discussion Paper
    Volume1996-40

    Fingerprint

    Medicaid
    Emergency Medical Services
    Inpatients
    Physicians

    Keywords

    • health
    • statistical methods

    Cite this

    Freund, D. A., Kniesner, T. J., & LoSasso, A. T. (1996). How Managed Care Affects Medicaid Utilization: A Synthetic Difference-in-Difference Zero-Inflated Count Model. (CentER Discussion Paper; Vol. 1996-40). Tilburg: Econometrics.
    Freund, D.A. ; Kniesner, T.J. ; LoSasso, A.T. / How Managed Care Affects Medicaid Utilization : A Synthetic Difference-in-Difference Zero-Inflated Count Model. Tilburg : Econometrics, 1996. (CentER Discussion Paper).
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    abstract = "We develop a synthetic difference-in-differences statistical design to apply to experimental data for adult women living in Hennepin County, Minnesota, to estimate the impact of Medicaid managed care on various modes of medical care use.Because the outcomes of interest are utilization counts with many persons using none of a particular mode of care we use count regression models that are adjusted for excessive zeros.We find no reductions in physician visits or hospital inpatient and emergency department care use, but reductions in hospital outpatient care.Simulations designed to judge the economic significance of our results suggest a program effect that is a savings of about ten percent.",
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    Freund, DA, Kniesner, TJ & LoSasso, AT 1996 'How Managed Care Affects Medicaid Utilization: A Synthetic Difference-in-Difference Zero-Inflated Count Model' CentER Discussion Paper, vol. 1996-40, Econometrics, Tilburg.

    How Managed Care Affects Medicaid Utilization : A Synthetic Difference-in-Difference Zero-Inflated Count Model. / Freund, D.A.; Kniesner, T.J.; LoSasso, A.T.

    Tilburg : Econometrics, 1996. (CentER Discussion Paper; Vol. 1996-40).

    Research output: Working paperDiscussion paperOther research output

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    N2 - We develop a synthetic difference-in-differences statistical design to apply to experimental data for adult women living in Hennepin County, Minnesota, to estimate the impact of Medicaid managed care on various modes of medical care use.Because the outcomes of interest are utilization counts with many persons using none of a particular mode of care we use count regression models that are adjusted for excessive zeros.We find no reductions in physician visits or hospital inpatient and emergency department care use, but reductions in hospital outpatient care.Simulations designed to judge the economic significance of our results suggest a program effect that is a savings of about ten percent.

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    Freund DA, Kniesner TJ, LoSasso AT. How Managed Care Affects Medicaid Utilization: A Synthetic Difference-in-Difference Zero-Inflated Count Model. Tilburg: Econometrics. 1996. (CentER Discussion Paper).