Σύγκριση μεθόδων

	Dynamic Panel Models in Politics	Εκτιμητής GMM Arellano-Bond
Πεδίο	Political Science	Οικονομετρία
Οικογένεια	Regression model	Regression model
Έτος προέλευσης	1995	1991
Δημιουργός	Nathaniel Beck & Jonathan Katz; Manuel Arellano & Stephen Bond	Manuel Arellano and Stephen Bond
Τύπος	Dynamic regression model for time-series cross-section data	GMM estimator for dynamic panel data
Θεμελιώδης πηγή	Beck, N., & Katz, J. N. (1995). What to Do (and Not to Do) with Time-Series Cross-Section Data. American Political Science Review, 89(3), 634–647.	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	Dynamic TSCS models, Lagged dependent variable panel models, Time-series cross-section dynamic models, Dynamic time-series cross-section analysis	AB-GMM, Difference GMM, first-difference GMM, Arellano-Bond estimator
Συναφείς	4	5
Σύνοψη	Dynamic panel models for political science analyze time-series cross-section (TSCS) data — repeated observations on countries, dyads, states, or other units over many years — where the outcome today depends on its own past. By including a lagged dependent variable alongside unit fixed effects, these models capture persistence and inertia common in comparative politics and international relations, but doing so introduces the Nickell bias. Estimators such as Arellano-Bond and system GMM, and design choices such as Beck-Katz panel-corrected standard errors, were developed to recover credible dynamic estimates from such data.	The Arellano-Bond GMM estimator is the standard approach for dynamic panel data models in which the lagged dependent variable appears as a regressor. By first-differencing to remove fixed effects and using deeper lags as instruments, it yields consistent estimates even when the error is serially correlated and regressors are endogenous.