Summary statistics for demo2004q3 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 75451 4435903 26680.79 4334632 4527730 caseid | 75451 4370079 500015.8 3003510 5735044 i_f_code | 0 i_f_code_num | 75447 71.4917 .8707726 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 51099 2.00e+07 79005.39 1.91e+07 3.00e+07 event_dt_num | 51099 15976.67 2888.57 -19692 378919 mfr_dt | 70115 2.00e+07 299383.2 1.98e+07 7.68e+07 mfr_dt_num | 70115 16313.8 10934.68 8865 2090150 -------------+-------------------------------------------------------- fda_dt | 75451 2.00e+07 83.9747 2.00e+07 2.00e+07 fda_dt_num | 75451 16302.47 27.23072 16168 16344 rept_cod | 0 rept_cod_num | 75451 740850.4 53592.27 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 55098 53.82876 21.23832 -2 200 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 25018 102.5692 84.87641 .1 9138 wt_cod | 0 rept_dt | 75137 2.00e+07 109455.4 1.99e+07 5.00e+07 rept_dt_num | 75137 16297.23 3997.722 12177 1111965 occp_cod | 0 -------------+-------------------------------------------------------- death_dt | 6523 2.00e+07 21410.4 1.92e+07 2.00e+07 to_mfr | 0 confid | 0 occp_cod_num | 56423 7539.489 502.7071 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015