Summary statistics for ther2018q3 dataset :

by Jean Roth , jroth@nber.org , 7 Mar 2019

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    663,319    1.93e+08    2.20e+08   4.01e+07   1.53e+09
      caseid |    663,319    1.47e+07     1106244    3761426   1.55e+07
dsg_drug_seq |    663,319     7.11723    13.10738          1        336
    start_dt |    631,405    1.48e+07     8887577       1020   3.01e+07
start_dt_num |    631,405     20372.7    2021.176    -348810     384846
-------------+---------------------------------------------------------
      end_dt |    308,113    1.57e+07     8345531       1970   2.11e+07
  end_dt_num |    308,113       20759    1014.274       3835      54192
         dur |      4,031    7.233565    57.35294          0       2020
     dur_cod |          0

by Jean Roth , jroth@nber.org , 7 Mar 2019