_dta:
  1.  pdp2018 data set up by Jean Roth , jroth@nber.org , 10 Sep 2018
  2.  Source Page: http://www.cms.gov/Medicare/Prescription-Drug-Coverage/PrescriptionDrugCovGenIn/index.html
  3.  Source File URL:
      www.cms.gov/Medicare/Prescription-Drug-Coverage/PrescriptionDrugCovGenIn/Downloads/2018-PDP-Landscape-Source-Files-v-10-
      > 14-17.zip
  4.  Excel file 2018LandscapeSource file PDP 10142017.xls
  5.  Sheet PDP
  6.  2018 Medicare Part D Stand-Alone Prescription Drug Plans
  7.  Data as of September 5, 2017.  Includes 2018 approved contracts/plans.  Employer sponsored plans (800 series) are
      excluded. Plans under sanction are not shown.
  8.  Notes: Data are subject to change as contracts are finalized.  For 2018, enhanced alternative plans may offer additional
      cost sharing reductions in the gap on a sub-set of the formulary drugs, beyond the standard Part D benefit.

  obs:         1,186                          
 vars:            13                          10 Sep 2018 21:18
 size:       215,852                          (_dta has notes)
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              storage   display    value
variable name   type    format     label      variable label
------------------------------------------------------------------------------------------------------------------------------
state           str24   %24s                  State
companyname     str47   %47s                  Company Name
planname        str44   %44s                  Plan Name
benefittype     str8    %9s                   Benefit Type
zerodollarpremiumwithfulllo
                str1    %9s                   $0 Premium with Full Low-Income Subsidy?
monthlydrugpremium
                double  %10.0g                Monthly Drug Premium
annualdrugdeductible
                int     %10.0g                Annual Drug Deductible
additionaldrugcoverageoffered
                str3    %9s                   Additional Drug Coverage Offered in the Gap
contractid      str5    %9s                   Contract ID
planid          str3    %9s                   Plan ID
benefittypedetail
                str2    %9s                   Benefit Type Detail
summarystarrating
                double  %10.0g                Summary Star Rating
summarystarratingstr
                str27   %27s                  Summary Star Rating
------------------------------------------------------------------------------------------------------------------------------
Sorted by: state  contractid  planid