Summary statistics for drug2008q3 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 |    399481    51.47978    31755.96          1   2.01e+07
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      5174    2.01e+07    27412.61   1.91e+07   2.02e+07
  exp_dt_num |      5174    18075.76    1001.388     -18596      22280
     nda_num |     95014    24481.46     13240.5       2126      89959

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