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st: How to estimate Non Linear Trend of a variable


From   mukta mukherjee <muktabondhu@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   st: How to estimate Non Linear Trend of a variable
Date   Tue, 18 Aug 2009 22:06:07 -0400

Dear All,
I am trying to estimate non-linear trend of  variable industry over
the years  in a  within effect- panel regression but cannot find any
code which will achieve this . Could anybody please help?
The estimation is of the following form :
xi: xtreg $y $x1 if (indusid <50 & d_pvt==1 ),fe cluster(indusid)
global  y "lwages"
global x1    "tax_Esop_Ins linc i.indusid|year i.year i.state|year"


I would appreciate if anybody can help.
Thanks

Mukta
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