Summary statistics for impact1990 dataset :

by Jean Roth , jroth@nber.org , 17 Mar 2016

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
    provider |          0
       fyear |      4,437        1990           0       1990       1990
      tacmiv |      4,437    1.199715    .1951758      .5593     3.2098
   wageindex |      4,437    1.094078      .18702   .8236298    1.73905
       ppsid |      4,437    260072.7    147588.1      10001     530029
-------------+---------------------------------------------------------
      caseta |          0
  sum_rltwts |          0

by Jean Roth , jroth@nber.org , 17 Mar 2016