Summary statistics for ther2014q4 dataset :

by Jean Roth , jroth@nber.org , 6 Apr 2017

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    270,930    1.14e+08    8.80e+07   3.13e+07   1.05e+09
      caseid |    270,930    1.04e+07    489792.5    3132024   1.07e+07
dsg_drug_seq |    270,930    4.563168     8.76578          1        221
    start_dt |    255,940    1.43e+07     9094144       1304   2.02e+07
start_dt_num |    255,940    19113.61    1917.231    -348062      20743
-------------+---------------------------------------------------------
      end_dt |    126,672    1.60e+07     8075973       1964   2.02e+07
  end_dt_num |    126,668    19579.74    793.4441       1644      20741
         dur |      1,683    50.25413    350.0998          1       9125
      durstr |          0
     dur_cod |          0

by Jean Roth , jroth@nber.org , 6 Apr 2017