Summary statistics for ther2013q2 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    237,997    9.58e+07    5.63e+07   3.30e+07   9.23e+08
      caseid |    237,997     9128594    387800.6    3299018    9971707
dsg_drug_seq |    237,997     4.21886    7.078023          1        131
    start_dt |    224,794    1.48e+07     8851914        200   2.91e+07
start_dt_num |    224,792    18609.04    2535.346    -347340     384705
-------------+---------------------------------------------------------
      end_dt |    110,893    1.63e+07     7877322       1965   2.01e+07
  end_dt_num |    110,889    19020.14    2117.131    -345924     347999
         dur |      1,830    34.69292    182.3397         .3       4200
      durstr |          0
     dur_cod |          0

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