Summary statistics for demo2012q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 231945 8140862 73893.08 7805388 8406255 caseid | 231945 8343683 227174.5 3035196 8605695 i_f_code | 0 i_f_code_num | 231945 71.45959 .8881345 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 141889 2.01e+07 36873.56 1.01e+07 2.01e+07 event_dt_num | 141889 18556.48 1352.477 -346248 19114 mfr_dt | 228094 2.01e+07 5540.747 2.00e+07 2.01e+07 mfr_dt_num | 228094 18974.35 157.8596 13950 19356 -------------+-------------------------------------------------------- fda_dt | 231945 2.01e+07 222.5031 2.01e+07 2.01e+07 fda_dt_num | 231945 19038.17 25.55056 18904 19083 rept_cod | 0 rept_cod_num | 231945 738161.5 52405.29 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 0 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 62733 82.16708 67.90899 0 8035 wtstr | 0 wt_cod | 0 rept_dt | 231656 2.01e+07 2909.463 1.99e+07 2.01e+07 rept_dt_num | 231656 19023.45 85.54917 10713 19137 -------------+-------------------------------------------------------- occp_cod | 0 death_dt | 0 to_mfr | 0 confid | 0 reporter_c~y | 0 -------------+-------------------------------------------------------- v24 | 0 occp_cod_num | 224177 7362.254 547.8559 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015