Summary statistics for ther2015q4 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    402,609    1.28e+08    1.06e+08   3.79e+07   1.18e+09
      caseid |    402,609    1.15e+07    660171.2    3790999   1.19e+07
dsg_drug_seq |    402,609    4.779754    8.384174          1        196
    start_dt |    380,596    1.39e+07     9278225       1193   2.02e+07
start_dt_num |    380,596    19409.36    1890.044    -347180      53156
-------------+---------------------------------------------------------
      end_dt |    172,676    1.57e+07     8336048       1973   2.02e+07
  end_dt_num |    172,676    19819.48    958.4131       2926      53156
         dur |        788    16.42893    126.9385          1       3505
     dur_cod |          0

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