Summary statistics for ther2006q4 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    115563     5159193    24543.47    5045669    5226527
dsg_drug_seq |    115563    1.01e+09     89781.8   1.01e+09   1.01e+09
    start_dt |    105697    2.00e+07    35246.41   1.90e+07   2.01e+07
start_dt_num |    105697    16379.31    1314.465     -21914      17894
      end_dt |     61346    2.01e+07    19571.04   1.91e+07   2.01e+07
-------------+--------------------------------------------------------
  end_dt_num |     61346    16737.07    733.4264     -18419      17166
         dur |     25243    1812.753    9108.671        -12      99360
     dur_cod |         0

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