Summary statistics for ther2004q2 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |     81864     4363610    19461.75    4267515    4445483
dsg_drug_seq |     81864    1.00e+09    76207.84   1.00e+09   1.01e+09
    start_dt |     74932    2.00e+07    153343.9   1.91e+07   4.99e+07
start_dt_num |     74932    15623.24    5601.961     -19994    1106434
      end_dt |     48967    2.00e+07    322383.7   1.82e+07   8.20e+07
-------------+--------------------------------------------------------
  end_dt_num |     48967    15966.09    11773.79     -51074    2279165
         dur |     14909    1898.188    8874.001          0      99360
     dur_cod |         0

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