Summary statistics for ther2009q2 dataset :

by Jean Roth , jroth@nber.org , 18 Dec 2015

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    200509     6196822    33310.89    6039519    6291336
dsg_drug_seq |    200509    1.01e+09    135849.5   1.01e+09   1.01e+09
    start_dt |    188209    2.01e+07    44558.11   1.91e+07   2.01e+07
start_dt_num |    188209    16977.22    1641.262     -18445      18322
      end_dt |    108163    2.01e+07    29157.61   1.91e+07   2.01e+07
-------------+--------------------------------------------------------
  end_dt_num |    108163    17398.58    1063.471     -18445      18250
         dur |     48260    125.6629    748.2933          0      76320
     dur_cod |         0

by Jean Roth , jroth@nber.org , 18 Dec 2015