Summary statistics for demo2007q1 dataset : by Jean Roth , jroth@nber.org , 18 Dec 2015 Variable | Obs Mean Std. Dev. Min Max -------------+-------------------------------------------------------- primaryid | 88832 5248963 29279.8 5120319 5337807 caseid | 88832 6224327 164763.5 3007837 6349423 i_f_code | 0 i_f_code_num | 88832 71.41314 .9106729 70 72 foll_seq | 0 -------------+-------------------------------------------------------- image | 0 event_dt | 61119 2.01e+07 21270.74 1.90e+07 2.01e+07 event_dt_num | 61119 16782.22 783.5988 -21549 17254 mfr_dt | 83269 2.01e+07 6584.173 2.00e+07 2.01e+07 mfr_dt_num | 83269 17112.53 190.7781 13696 17254 -------------+-------------------------------------------------------- fda_dt | 88832 2.01e+07 3256.225 2.01e+07 2.01e+07 fda_dt_num | 88832 17201.36 34.03973 17076 17256 rept_cod | 0 rept_cod_num | 88832 733685.5 51348.91 687382 806982 mfr_num | 0 -------------+-------------------------------------------------------- mfr_sndr | 0 age | 57177 187.6853 1742.477 -1 31332 age_cod | 0 sex | 0 e_sub | 0 -------------+-------------------------------------------------------- wt | 31017 113.2403 370.6385 .05 63502 wt_cod | 0 rept_dt | 88747 2.01e+07 5283.003 2.00e+07 2.01e+07 rept_dt_num | 88747 17170.91 142.357 13371 17279 occp_cod | 0 -------------+-------------------------------------------------------- death_dt | 6176 2.01e+07 17102.13 1.97e+07 2.01e+07 to_mfr | 0 confid | 0 reporter_c~y | 0 occp_cod_num | 73674 7441.078 531.1511 6778 8072 by Jean Roth , jroth@nber.org , 18 Dec 2015