Summary statistics for demo2014q4 dataset : by Jean Roth , jroth@nber.org , 6 Apr 2017 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- primaryid | 208,057 1.07e+08 3.62e+07 3.13e+07 1.05e+09 caseid | 208,057 1.05e+07 325434.7 3132024 1.10e+07 caseversion | 208,057 1.521732 1.095425 1 40 i_f_code | 0 i_f_code_num | 208,057 71.33831 .9410383 70 72 -------------+--------------------------------------------------------- event_dt | 117,044 1.25e+07 9716565 1950 2.01e+07 event_dt_num | 117,044 19592.52 1430.917 -346018 20376 mfr_dt | 198,827 2.01e+07 3197.363 2.00e+07 2.01e+07 mfr_dt_num | 198,827 19993.37 138.1679 13046 20088 init_fda_dt | 208,057 2.01e+07 3708.298 2.00e+07 2.01e+07 -------------+--------------------------------------------------------- init_fda_d~m | 208,057 20001.42 158.3858 14070 20088 fda_dt | 208,057 2.01e+07 89.6781 2.01e+07 2.01e+07 fda_dt_num | 208,057 20042.35 26.50679 19666 20088 rept_cod | 0 rept_cod_num | 208,057 738556.6 52686.44 687382 806982 -------------+--------------------------------------------------------- auth_num | 0 mfr_num | 0 mfr_sndr | 0 lit_ref | 0 age | 129,564 144.4737 1468.917 -10 35156 -------------+--------------------------------------------------------- age_cod | 0 age_grp | 0 age_grp_num | 0 sex | 0 e_sub | 0 -------------+--------------------------------------------------------- wt | 46,790 83.18853 52.14495 0 7201 wtstr | 0 wt_cod | 0 rept_dt | 207,846 2.01e+07 174943.9 201212 2.02e+07 rept_dt_num | 207,830 20039.01 47.67979 17496 20101 -------------+--------------------------------------------------------- to_mfr | 0 occp_cod | 0 reporter_c~y | 0 occr_country | 0 occp_cod_num | 199,687 7334.187 560.6758 6778 8072 by Jean Roth , jroth@nber.org , 6 Apr 2017