Summary statistics for miper dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- st_case | 63,064 275648.6 159875.8 10001 560152 veh_no | 63,064 1.187254 .8009251 0 22 per_no | 63,064 1.022438 .3316702 1 25 year | 63,064 1983 0 1983 1983 p1 | 63,064 6.644456 9.703836 0 77 -------------+--------------------------------------------------------- p2 | 63,064 6.637828 9.693523 0 71 p3 | 63,064 6.582852 9.673926 0 79 p4 | 63,064 6.715258 9.731423 0 75 p5 | 63,064 6.728498 9.709918 0 71 p6 | 63,064 6.695865 9.739851 0 71 -------------+--------------------------------------------------------- p7 | 63,064 6.588815 9.621811 0 71 p8 | 63,064 6.599502 9.677758 0 89 p9 | 63,064 6.756723 9.766053 0 71 p10 | 63,064 6.567471 9.62981 0 71 by Jean Roth , jroth@nber.org , 18 Apr 2016