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st: xtsum -- meaning of within "min" and "max"

From   david reinstein <>
Subject   st: xtsum -- meaning of within "min" and "max"
Date   Wed, 16 Jul 2003 17:32:33 -0700 (PDT)

The "min" and "max" part of the within column of xtsum
confuses me -- it must be some sort of difference, but
I cant figure out what!  It gives strange fractional
values for 0,1 variables, gives absurdly large or
small values in some cases, sometimes gives negative
values, but gives only positive values for an income
-Anyone know what this is doing?

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