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Slide Presentation from the AHRQ 2007 Annual Conference

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Control Variables

Text Description is below the image.
  • Xit: a vector of other explanatory variables for hospital i in year t
    • % Medicare patient days
    • % Medicaid days
    • The hospital mean of the Charlson comorbidity score
    • % surgical discharges
    • Market concentration (HHI)
    • County-level per capita income
    • County-level population density
  • Zt is a vector of the year dummy variables which will adjust the effects of unmeasured, time-specific factors

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