Summary statistics for drug2010q2 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 |    576941    1.271849     .444913          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      4289    2.01e+07    25830.32   1.91e+07   2.11e+07
  exp_dt_num |      4289    18819.51    940.3075     -17717      55304
     nda_num |    130197    24591.97    14068.77        552      91652

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