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st: prediction/imputation: extending a 1994-2002 panel to 1988


From   nicola.baldini2@unibo.it
To   statalist@hsphsun2.harvard.edu
Subject   st: prediction/imputation: extending a 1994-2002 panel to 1988
Date   Tue, 27 Mar 2007 17:47:03 +0200

I would like to orthogonalize two panel variables observed for 60 universities: students and R&D expenditures. The problem is that one is observed for T=15 (1988-2002), the other for T=9 only (1994-2002). Which is the best way to create the missing panel (1988-93) for the second variable?

Nicola

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