Summary statistics for partdpremiumobligationwith75prem variable in ma2010 dataset :

    Variable |        Obs        Mean    Std. Dev.       Min        Max
-------------+---------------------------------------------------------
partd~75prem |    195,407    16.42242    53.09816          0     1223.7

by Jean Roth , jroth@nber.org , 14 Apr 2016