Summary statistics for ther2005q4 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    113066     4834776    26380.85    4711981    4903667
dsg_drug_seq |    113066    1.01e+09     98223.3   1.01e+09   1.01e+09
    start_dt |    102522    2.00e+07    56888.92   1.92e+07   3.00e+07
start_dt_num |    102522    15929.65    2097.436     -16425     378339
      end_dt |     65383    2.00e+07    131177.5   1.91e+07   5.01e+07
-------------+--------------------------------------------------------
  end_dt_num |     65383    16342.27    4794.601     -19603    1112432
         dur |     27261    1228.149    7263.461          0      99360
     dur_cod |         0

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