Summary statistics for ther2007q4 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    154280     5527529    32203.67    5378422    5625752
dsg_drug_seq |    154280    1.01e+09    110999.4   1.01e+09   1.01e+09
    start_dt |    142822    2.01e+07    33564.98   1.91e+07   2.01e+07
start_dt_num |    142822    16683.01    1254.475     -18776      17528
      end_dt |     73846    2.01e+07    20413.36   1.97e+07   2.01e+07
-------------+--------------------------------------------------------
  end_dt_num |     73846    17062.77    765.7313       2454      17532
         dur |     27485    1995.553    9456.356          0      99360
     dur_cod |         0

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