Summary statistics for ther2004q4 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |     93304     4507539    23362.91    4391150    4598178
dsg_drug_seq |     93304    1.01e+09    88348.65   1.00e+09   1.01e+09
    start_dt |     84487    2.00e+07    61836.09   1.94e+07   2.99e+07
start_dt_num |     84487    15615.94    2277.647      -8035     377891
      end_dt |     55171    2.00e+07    64962.22   1.72e+07   3.00e+07
-------------+--------------------------------------------------------
  end_dt_num |     55171    16009.55    2380.329     -87438     381434
         dur |     19925    1785.945    8571.837          0      99360
     dur_cod |         0

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