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st: Levpet and Time Dummies.

From   natasha agarwal <>
Subject   st: Levpet and Time Dummies.
Date   Wed, 20 Mar 2013 21:04:31 +0530

Dear All,

Please accept my apologies for the previous post.

I was attempting to calculate the TFP for a sample of firms for the
period 2001 to 2005 using the levpet command, and wanted to know if
one can use time dummies in the free variable list ?

Please note that levpet is a user written programme available as a
stata module by levinsohn and petrin in their co-authored paper in
2003. Stata Journal article of the
same can be accessed at The same
can be downloaded as ssc install levpet

Your help will be highly appreciated.

Many thanks,
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