Summary statistics for drug2007q3 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    328096     5423809    29151.23    5285252    5530192
    drug_seq |    328096    1.01e+09    104442.9   1.01e+09   1.01e+09
    role_cod |         0
    drugname |         0
     val_vbm |    328096    1.225849    .4181405          1          2
-------------+--------------------------------------------------------
       route |         0
    dose_vbm |         0
      dechal |         0
      rechal |         0
     lot_num |         0
-------------+--------------------------------------------------------
      exp_dt |      4869    2.01e+07    43614.76   1.91e+07   2.02e+07
  exp_dt_num |      4869    17680.06    1593.032     -18993      22127
     nda_num |     86979     23802.8    11937.12        123      89959

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