Summary statistics for ther2008q1 dataset :

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

    Variable |       Obs        Mean    Std. Dev.       Min        Max
-------------+--------------------------------------------------------
   primaryid |    150535     5635276    31532.27    5476957    5771298
dsg_drug_seq |    150535    1.01e+09    110151.1   1.01e+09   1.01e+09
    start_dt |    139090    2.01e+07    35710.05   1.94e+07   2.01e+07
start_dt_num |    139090    16768.36    1326.726      -7305      17869
      end_dt |     84059    2.01e+07    22946.39   1.91e+07   2.01e+07
-------------+--------------------------------------------------------
  end_dt_num |     84059    17118.93    836.9184     -18584      17893
         dur |     30532    1383.579    7609.062          0      99360
     dur_cod |         0

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