방법 비교

	Robust Difference GMM	패널 아렐라노-본 GMM 추정량
분야	계량경제학	계량경제학
계열	Regression model	Regression model
기원 연도	1991 / 2005	1991
창시자	Arellano & Bond (1991); robust inference extension via Windmeijer (2005)	Manuel Arellano and Stephen Bond
유형	GMM estimator with robust standard errors	Dynamic panel GMM estimator
원전	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.
별칭	robust Arellano-Bond estimator, difference GMM with robust SE, HAC difference GMM, AB-GMM robust	Arellano-Bond GMM, AB-GMM, difference GMM estimator, dynamic panel GMM
관련	6	5
요약	Robust Difference GMM applies the Arellano-Bond first-difference GMM estimator with heteroscedasticity- and autocorrelation-consistent (HAC) or Windmeijer-corrected standard errors, delivering valid inference for dynamic panel models even when error variances are non-constant or residuals are cross-sectionally correlated.	The Arellano-Bond GMM estimator addresses the two core problems of dynamic panel models — individual fixed effects correlated with the regressors, and the endogeneity introduced by a lagged dependent variable — by first-differencing to remove fixed effects and then using lagged levels of the dependent variable as internal instruments.