_dta:
  1.  casemix2018 set up by Jean Roth , jroth@nber.org , 30 Aug 2017
  2.  NBER URL: http://www.nber.org/data/cms-impact-file-hospital-inpatient-prospective-payment-system-ipps.html
  3.  Source Page:
      https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/AcuteInpatientPPS/FY2018-IPPS-Final-Rule-Home-Page-Items/FY2018-IPPS-Final-Rule-Data-File
      > s.html
  4.  Source File URL: https://www.cms.gov/Medicare/Medicare-Fee-for-Service-Payment/AcuteInpatientPPS/Downloads/FY2018-CMS-1677-FR-Case-Mix.zip
  5.  Source: FY18 CMIs - V33 Billed DRGs (FR 2018).txt

  obs:         3,382                          
 vars:             5                          30 Aug 2017 16:42
 size:       114,988                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
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provider        str6    %9s                   Provider
cases           double  %10.0g                Cases
casemixindex    double  %10.0g                Total Case Mix Index-Sum of Relative Weights
sumcasemix      double  %10.0g                Total Case Mix
year            float   %9.0g                 Fiscal Year
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Sorted by: provider