Summary statistics for demo2008q4 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 121024 5966664 35593.1 5796472 6124505 caseid | 121024 6788139 158242.6 3041827 6981791 i_f_code | 0 i_f_code_num | 121024 71.36451 .9312048 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 84768 2.01e+07 42572.46 1.01e+07 2.01e+07 event_dt_num | 84768 17395.82 1568.978 -347676 17896 mfr_dt | 112864 2.01e+07 7726.709 1.98e+07 2.01e+07 mfr_dt_num | 112864 17769.03 298.8661 5702 17897 -------------+-------------------------------------------------------- fda_dt | 121024 2.01e+07 84.49902 2.01e+07 2.01e+07 fda_dt_num | 121024 17855.86 26.21425 17714 17897 rept_cod | 0 rept_cod_num | 121024 735829.4 52168.6 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 90019 138.4055 1412.464 -731 34424 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 35182 88.84083 49.98295 0 2280 wt_cod | 0 rept_dt | 120992 2.01e+07 557.6188 2.00e+07 2.01e+07 rept_dt_num | 120992 17851.97 38.11689 14917 17897 occp_cod | 0 -------------+-------------------------------------------------------- death_dt | 8485 2.01e+07 33629.77 1.95e+07 2.21e+07 to_mfr | 0 confid | 0 reporter_c~y | 0 occp_cod_num | 102221 7401.133 545.6027 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015