Summary statistics for ther2018q4 dataset :

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

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
   primaryid |    620,308    1.94e+08    2.16e+08   3.76e+07   1.56e+09
      caseid |    620,308    1.50e+07     1196318    3761713   1.59e+07
dsg_drug_seq |    620,308     7.89896    15.28656          1        310
    start_dt |    590,770    1.39e+07     9270471       1109   3.01e+07
start_dt_num |    590,770    20305.98    2671.828    -346977     390245
-------------+---------------------------------------------------------
      end_dt |    280,743    1.48e+07     8895244       1966   2.11e+07
  end_dt_num |    280,743     20645.8    1443.648    -343863      53859
         dur |        969    11.69579    98.34718          1       2018
     dur_cod |          0

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