We show that two commonly employed estimation procedures to deal with correlated unobserved heterogeneity in panel data models, within-groups and first-differenced OLS, can lead to very different estimates of treatment effects when these are not constant over time and treatment is a state that only changes occasionally. It is therefore important to allow for flexible time varying treatment effects when estimating panel data models with binary indicator variables as is illustrated by an example of the effects of marital status on mental wellbeing.
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Paper provided by University of Toronto, Department of Economics in its series Working Papers with number
laporte-04-01.
Find related papers by JEL classification: C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data C51 - Mathematical and Quantitative Methods - - Econometric Modeling - - - Model Construction and Estimation
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Elias Papaioannou & Gregorios Siourounis, 2007.
"Democratization And Growth,"
CEDI Discussion Paper Series
07-13, Centre for Economic Development and Institutions(CEDI), Brunel University.
[Downloadable!]
Other versions:
Elias Papaioannou & Gregorios Siourounis, 2008.
"Democratization and Growth,"
Working Papers
00027, University of Peloponnese, Department of Economics.
[Downloadable!]
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