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Re: st: pkcross - labeling error


From   ymarchenko@stata.com (Yulia Marchenko, StataCorp)
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: pkcross - labeling error
Date   Fri, 14 Apr 2006 16:15:08 -0500

Ricardo Ovaldia <ovaldia@yahoo.com> notices that:

> if the data is organized in "Period" order then you get the correct labeling
> of estimates, whereas if the data is in "treatment" order then the labels
> appear backwards.  

As Ricardo points out it is important that the data are arranged in a "Period"
order to obtain the correct estimates of treatment and period effects.
According to the syntax of -pkshape- (see [R] pkshape, p.418, in the Stata 9
Reference Manual) the user should list the variables containing the values of
treatments applied in the corresponding periods, i.e.  period1, period2 and so
on.


 -- Yulia
ymarchenko@stata.com
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