Summary statistics for ther2008q4 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    176268     5964958    36113.22    5796472    6124505
dsg_drug_seq |    176268    1.01e+09    123524.5   1.01e+09   1.01e+09
    start_dt |    163773    2.01e+07    43713.35   1.01e+07   2.01e+07
start_dt_num |    163773    17019.24    1621.282    -347396      17895
      end_dt |     85982    2.01e+07    21831.72   1.91e+07   2.01e+07
-------------+--------------------------------------------------------
  end_dt_num |     85982    17431.79    818.5193     -18993      17897
         dur |     32221    143.5454    1455.675          0      90720
     dur_cod |         0

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