Summary statistics for miper dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 63,870 2001 0 2001 2001 st_case | 63,870 274225.5 161279.9 10001 560155 veh_no | 63,870 1.349256 1.61677 0 57 per_no | 63,870 1.014858 .1960522 1 13 p1 | 63,870 4.318804 8.467989 0 76 -------------+--------------------------------------------------------- p2 | 63,870 4.349209 8.479315 0 76 p3 | 63,870 4.329263 8.445093 0 76 p4 | 63,870 4.323407 8.458931 0 76 p5 | 63,870 4.285517 8.411372 0 76 p6 | 63,870 4.338077 8.474207 0 76 -------------+--------------------------------------------------------- p7 | 63,870 4.298935 8.445655 0 81 p8 | 63,870 4.294504 8.419082 0 76 p9 | 63,870 4.360623 8.484893 0 76 p10 | 63,870 4.31896 8.44277 0 76 by Jean Roth , jroth@nber.org , 18 Apr 2016