Summary statistics for ther2010q3 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 301671 6924320 62376.14 6668640 7082600 dsg_drug_seq | 301671 1.01e+09 237901.5 1.01e+09 1.02e+09 start_dt | 282710 2.01e+07 69067.67 230401 2.01e+07 start_dt_num | 282709 17390.68 1747.921 -347575 125657 end_dt | 141543 2.01e+07 24080.59 1.90e+07 2.01e+07 -------------+-------------------------------------------------------- end_dt_num | 141543 17879.31 885.9111 -21914 18616 dur | 57312 138.7421 458.7629 -21 16425 dur_cod | 0 by Jean Roth , jroth@nber.org , 18 Dec 2015