Frequencies for ehrred variable in impact2017 dataset :

  Proxy EHR |
  Reduction |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      3,222       94.51       94.51
          1 |        187        5.49      100.00
------------+-----------------------------------
      Total |      3,409      100.00

by Jean Roth , jroth@nber.org , 30 Aug 2017