Summary statistics for tchnlgst_asct_dgr_cnt variable in pos2004 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
tchnlgst_a~t |    108,700    .0189362    .9328731          0        200

by Jean Roth , jroth@nber.org , 17 May 2017