Summary statistics for ther2012q2 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    348452     8370032    68885.44    8017085    8618484
dsg_drug_seq |    348452    1.02e+09    254267.7   1.02e+09   1.02e+09
    start_dt |    327084    2.01e+07    44830.72   1.01e+07   2.01e+07
start_dt_num |    327084    18148.16    1649.307    -348655      19356
      end_dt |    166845    2.01e+07    42444.37   1.01e+07   2.01e+07
-------------+--------------------------------------------------------
  end_dt_num |    166845    18599.64     1545.59    -347794      19356
         dur |     66483    195.9893    658.2789          0      48667
     dur_cod |         0

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