Summary statistics for drug2010q1 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 |    526621    1.281759    .4498567          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      3866    2.01e+07    34821.45   1.91e+07   2.11e+07
  exp_dt_num |      3866    18756.16     1269.02     -17381      55424
     nda_num |    106339     26298.7    15902.92          1      90763

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