Summary statistics for demo2009q3 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 130072 6318580 37984.36 6142610 6453317 caseid | 130073 7038054 183250.6 13 7246377 i_f_code | 0 i_f_code_num | 130072 71.34304 .9393241 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 88632 2.01e+07 68987.16 980612 2.01e+07 event_dt_num | 88632 17653.33 9613.626 -18212 2866041 mfr_dt | 121660 2.01e+07 5280.89 1.97e+07 2.01e+07 mfr_dt_num | 121660 18061.65 195.054 4576 18170 -------------+-------------------------------------------------------- fda_dt | 130073 2.01e+07 81.81175 2.01e+07 2.01e+07 fda_dt_num | 130073 18127.03 26.23791 17988 18170 rept_cod | 0 rept_cod_num | 130072 730377.7 50013.35 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 94593 322.3932 2249.744 -1096 34774 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 42511 87.99651 56.23285 .2 5850 wt_cod | 0 rept_dt | 129881 2.01e+07 959.63 1.99e+07 2.01e+07 rept_dt_num | 129881 18123.09 44.74964 11146 18171 occp_cod | 0 -------------+-------------------------------------------------------- death_dt | 10446 2.01e+07 139446.3 1.01e+07 2.01e+07 to_mfr | 0 confid | 0 reporter_c~y | 0 occp_cod_num | 105206 7466.611 533.5001 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015