Summary statistics for numdiffphyspdeceol variable in daphosp2011 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
numdiffphy~l |      2,542    11.09942    2.751248   3.396399    21.1301

by Jean Roth , jroth@nber.org , 14 Mar 2018