Summary statistics for ther2009q1 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    162035     6084972    32746.54    5931361    6253112
dsg_drug_seq |    162035    1.01e+09    120106.1   1.01e+09   1.01e+09
    start_dt |    147805    2.01e+07    39664.38   1.91e+07   2.01e+07
start_dt_num |    147805    17056.15     1476.57     -17481      18234
      end_dt |     88365    2.01e+07    23699.86   1.97e+07   2.01e+07
-------------+--------------------------------------------------------
  end_dt_num |     88365    17465.15    875.0826       2922      18241
         dur |     35662    173.0192    1705.107          0      87840
     dur_cod |         0

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