Summary statistics for impact1991 dataset : by Jean Roth , jroth@nber.org , 17 Mar 2016 Variable | Obs Mean Std. Dev. Min Max -------------+--------------------------------------------------------- provider | 0 fyear | 4,384 1991 0 1991 1991 tacmiv | 4,384 1.21852 .2136704 .5025 2.7545 wageindex | 4,384 1.099631 .200326 .8350133 1.755763 ppsid | 4,384 261558 147440.6 10001 530029 -------------+--------------------------------------------------------- caseta | 0 sum_rltwts | 0 by Jean Roth , jroth@nber.org , 17 Mar 2016