Summary statistics for per_aux dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- a_age1 | 1,410 2.835461 1.03995 1 5 a_age2 | 1,410 3.802837 1.495009 1 6 a_age3 | 1,410 7.483688 2.795632 1 13 a_age4 | 1,410 4.275177 2.057587 1 8 a_age5 | 1,410 4.607092 2.578275 1 10 -------------+--------------------------------------------------------- a_age6 | 1,410 4.620567 2.561937 1 10 a_age7 | 1,410 6.529787 2.708351 1 12 a_age8 | 1,410 3.215603 1.923752 1 7 veh_no | 1,410 1.091489 .7301661 0 4 per_no | 1,410 1.612057 1.286716 1 13 -------------+--------------------------------------------------------- st_case | 1,410 430283 156.9379 430001 430553 year | 1,410 1997 0 1997 1997 a_ptype | 1,410 1.686525 .8208791 1 5 a_rest | 1,410 1.71773 .5177178 1 3 a_alctes | 1,410 2.116312 .9285797 1 4 -------------+--------------------------------------------------------- a_hisp | 1,410 0 0 0 0 a_rcat | 1,410 0 0 0 0 a_hrace | 1,410 0 0 0 0 a_eject | 1,410 1.089362 .3830515 1 3 a_perinj | 1,410 3.900709 2.468553 1 6 -------------+--------------------------------------------------------- a_loc | 1,410 1.380851 .7841958 1 3 by Jean Roth , jroth@nber.org , 18 Apr 2016