Summary statistics for drug2011q2 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 |    755482    1.206332    .4046718          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      4619    2.01e+07    209640.4   1.99e+07   3.01e+07
  exp_dt_num |      4619    19285.77    7654.844      12691     384720
     nda_num |    180270    26654.72    17823.69        552     202379

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