Summary statistics for arwbo19ages dataset : by Jean Roth , jroth@nber.org , 2 May 2017 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- year | 348,856 1992.75 13.58847 1969 2015 st | 0 stfips | 0 county | 0 registry | 348,856 99 0 99 99 -------------+--------------------------------------------------------- race | 348,856 1.912792 .8204434 1 3 hispanic | 348,856 9 0 9 9 sex | 348,856 1.503924 .4999853 1 2 age | 348,856 8.74953 5.33444 0 18 pop | 348,856 334.7838 787.7899 1 13135 by Jean Roth , jroth@nber.org , 2 May 2017