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st: Re: xtunitroot ips error for 'no observations' and trend


From   wangpan110 <wangpan110@hotmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: Re: xtunitroot ips error for 'no observations' and trend
Date   Sun, 19 Sep 2010 16:56:20 -0700 (PDT)

Hi Scott, 1) does the involvement of -trend- mean the unit root test account
both DSP and TSP? 
             2) the involvement of trend changes the p-value substantially,
does it mean the nonstationarity of this panel/series is closely related
with TSP? if it is, what i should do?

many thanks

Pan
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