Summary statistics for drug2011q1 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |         0
    drug_seq |         0
    role_cod |         0
    drugname |         0
     val_vbm |    687024    30.57726    24286.95          1   2.01e+07
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      4700    2.01e+07    149012.3   1.91e+07   3.01e+07
  exp_dt_num |      4700    19133.87    5442.741     -17015     384082
     nda_num |    148688    26258.24    16505.84        552     201532

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