Summary statistics for miper dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 65,494 2005 0 2005 2005 st_case | 65,494 268569.8 161308.5 10001 560147 veh_no | 65,494 1.297997 .8362575 0 20 per_no | 65,494 1.011314 .1615195 1 12 p1 | 65,494 4.339604 8.513967 0 94 -------------+--------------------------------------------------------- p2 | 65,494 4.332427 8.488346 0 94 p3 | 65,494 4.339833 8.505199 0 94 p4 | 65,494 4.346429 8.485896 0 94 p5 | 65,494 4.298516 8.461305 0 94 p6 | 65,494 4.29844 8.457511 0 72 -------------+--------------------------------------------------------- p7 | 65,494 4.350719 8.472935 0 94 p8 | 65,494 4.302333 8.457242 0 94 p9 | 65,494 4.373561 8.499793 0 94 p10 | 65,494 4.283553 8.425818 0 94 by Jean Roth , jroth@nber.org , 18 Apr 2016