Summary statistics for drug2005q1 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    279283     4584485    24835.77    4467925    4700566
    drug_seq |    279283    1.01e+09    91702.22   1.01e+09   1.01e+09
    role_cod |         0
    drugname |         0
     val_vbm |    279283    1.271402    .4446838          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      5125    2.01e+07      142862   1.91e+07   3.01e+07
  exp_dt_num |      5125     16859.1    5217.381     -20029     382225
     nda_num |     34332    23878.04    13375.12       2098      89997

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