Summary statistics for demo2011q4 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 208742 7914334 69764.37 7586431 8233208 caseid | 208742 8182306 223799.6 3124297 8487332 i_f_code | 0 i_f_code_num | 208742 71.45078 .892639 70 72 foll_seq | 4546 1.672019 1.256182 1 15 -------------+-------------------------------------------------------- image | 0 event_dt | 131723 2.01e+07 37039.41 1.01e+07 2.01e+07 event_dt_num | 131723 18465.01 1371.579 -346325 18990 mfr_dt | 204862 2.01e+07 3065.999 1.99e+07 2.01e+07 mfr_dt_num | 204862 18890.15 135.1906 9497 18991 -------------+-------------------------------------------------------- fda_dt | 208742 2.01e+07 79.88047 2.01e+07 2.01e+07 fda_dt_num | 208742 18947.06 25.06494 18809 18992 rept_cod | 0 rept_cod_num | 208742 737446.2 52217.13 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 148162 103.2903 1087.998 -933 35199 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 51053 81.19934 278.5624 0 61036 wt_cod | 0 rept_dt | 208449 2.01e+07 392.176 2.00e+07 2.01e+07 rept_dt_num | 208449 18944.66 30.77153 14891 18992 occp_cod | 0 -------------+-------------------------------------------------------- to_mfr | 0 confid | 0 reporter_c~y | 0 occp_cod_num | 198861 7391.639 544.2244 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015