Summary statistics for ther2016q4 dataset :

by Jean Roth , jroth@nber.org , 18 Sep 2017

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    436,010    1.50e+08    1.46e+08   4.08e+07   1.29e+09
      caseid |    436,010    1.26e+07    784786.6    4083807   1.31e+07
dsg_drug_seq |    436,010    5.906204    10.53758          1        203
    start_dt |    413,338    1.39e+07     9273047       1900   6.02e+07
start_dt_num |    413,338     19849.4    2954.682    -346199    1481697
-------------+---------------------------------------------------------
      end_dt |    194,487    1.48e+07     8848397       1900   2.02e+07
  end_dt_num |    194,487     20194.6    1232.712    -345566      21077
         dur |        329    24.92462    170.3848          1       1885
     dur_cod |          0

by Jean Roth , jroth@nber.org , 18 Sep 2017