Summary statistics for miacc dataset : by Jean Roth , jroth@nber.org , 18 Apr 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- st_case | 37,140 279069 160271.9 10001 560162 year | 37,140 1999 0 1999 1999 a1 | 37,140 6.775956 9.920189 0 81 a2 | 37,140 6.767286 9.910939 0 81 a3 | 37,140 6.747819 9.920568 0 81 -------------+--------------------------------------------------------- a4 | 37,140 6.703743 9.849722 0 81 a5 | 37,140 6.737211 9.896316 0 81 a6 | 37,140 6.722482 9.849899 0 81 a7 | 37,140 6.748492 9.905814 0 81 a8 | 37,140 6.741626 9.903969 0 81 -------------+--------------------------------------------------------- a9 | 37,140 6.758374 9.900528 0 81 a10 | 37,140 6.711012 9.88103 0 81 by Jean Roth , jroth@nber.org , 18 Apr 2016