Σύγκριση μεθόδων

	Εκτιμητής GMM Arellano-Bond Robust	Εκτιμητής GMM Διαφορών (Arellano-Bond)
Πεδίο	Οικονομετρία	Οικονομετρία
Οικογένεια	Regression model	Regression model
Έτος προέλευσης	1991	1991
Δημιουργός	Arellano & Bond (1991); robust inference extensions by Windmeijer (2005)	Manuel Arellano and Stephen Bond
Τύπος	Dynamic panel GMM estimator with robust inference	GMM panel estimator
Θεμελιώδης πηγή	Arellano, M., & Bond, S. (1991). Some tests of specification for panel data: Monte Carlo evidence and an application to employment equations. The Review of Economic Studies, 58(2), 277-297.	Arellano, M., & Bond, S. (1991). Some tests of specification for panel data: Monte Carlo evidence and an application to employment equations. Review of Economic Studies, 58(2), 277–297.
Εναλλακτικές ονομασίες	Robust Difference GMM, AB-GMM with robust standard errors, Robust first-difference GMM, Arellano-Bond robust estimator	Arellano-Bond estimator, AB-GMM, first-difference GMM, difference GMM estimator
Συναφείς	6	5
Σύνοψη	The Robust Arellano-Bond GMM estimator applies the Arellano-Bond first-difference GMM approach to dynamic panel data while computing heteroscedasticity- and autocorrelation-consistent (robust) standard errors. This combination handles the Nickell bias from lagged dependent variables and simultaneously yields reliable inference when error variances differ across units or periods.	Difference GMM, introduced by Arellano and Bond (1991), estimates dynamic panel data models by first-differencing the equation to remove fixed effects, then using lagged levels of the endogenous variables as GMM instruments. It is the standard approach when a lagged dependent variable or other endogenous regressors are present in a panel with many units and few time periods.