Summary statistics for demo2005q4 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 88518 4834376 27705.81 4705002 4932973 caseid | 88518 5888444 233462.9 3082640 6033483 i_f_code | 0 i_f_code_num | 88507 71.36477 .9311016 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 61657 2.00e+07 46380.32 1.92e+07 3.01e+07 event_dt_num | 61657 16274.3 1706.445 -15215 381980 mfr_dt | 82856 2.01e+07 181672.1 1.91e+07 5.20e+07 mfr_dt_num | 82856 16719.5 6636.102 -18783 1183683 -------------+-------------------------------------------------------- fda_dt | 88518 2.01e+07 84.70872 2.01e+07 2.01e+07 fda_dt_num | 88518 16756.18 26.59557 16618 16801 rept_cod | 0 rept_cod_num | 88518 725569.9 47522.59 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 58185 251.1723 2218.798 -29 34723 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 28067 108.1957 93.88739 0 9205 wt_cod | 0 rept_dt | 88199 2.01e+07 134854.3 2.00e+07 6.01e+07 rept_dt_num | 88199 16766.87 4924.663 13751 1477423 occp_cod | 0 -------------+-------------------------------------------------------- death_dt | 6729 2.00e+07 512539.6 1.92e+07 6.20e+07 to_mfr | 0 confid | 0 reporter_c~y | 0 occp_cod_num | 70660 7528.389 486.291 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015