Summary statistics for demo2011q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 181140 7301410 55092.8 7024584 7615688 caseid | 181140 7750722 221295.8 3466710 8098563 i_f_code | 0 i_f_code_num | 181140 71.42059 .9072525 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 111878 2.01e+07 25473.65 1.91e+07 2.01e+07 event_dt_num | 111878 18207.32 935.9598 -18194 18716 mfr_dt | 173818 2.01e+07 5464.276 1.99e+07 2.01e+07 mfr_dt_num | 173818 18615.01 152.1083 11954 18731 -------------+-------------------------------------------------------- fda_dt | 181140 2.01e+07 242.8484 2.01e+07 2.01e+07 fda_dt_num | 181140 18674.59 24.63367 18536 18717 rept_cod | 0 rept_cod_num | 181140 733492.3 50980.36 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 127937 118.5384 1236.982 -33 35834 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 51485 83.97806 316.9018 0 71291 wt_cod | 0 rept_dt | 180756 2.01e+07 1220.219 2.00e+07 2.01e+07 rept_dt_num | 180756 18672.26 37.11852 15857 18717 occp_cod | 0 -------------+-------------------------------------------------------- to_mfr | 0 confid | 0 reporter_c~y | 0 occp_cod_num | 171278 7388.358 544.3876 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015