So sánh phương pháp

	Mô hình hiệu ứng cố định vững chắc (Robust Fixed Effects Model)	OLS mạnh mẽ (OLS với sai số chuẩn mạnh mẽ)
Lĩnh vực	Kinh tế lượng	Kinh tế lượng
Họ	Regression model	Regression model
Năm ra đời	1987	1980
Người khởi xướng	Manuel Arellano	Halbert White
Loại	Panel regression with robust inference	Linear regression with robust inference
Công trình gốc	Arellano, M. (1987). Computing robust standard errors for within-groups estimators. Oxford Bulletin of Economics and Statistics, 49(4), 431–434.	White, H. (1980). A heteroskedasticity-consistent covariance matrix estimator and a direct test for heteroskedasticity. Econometrica, 48(4), 817–838.
Tên gọi khác	FE with robust standard errors, cluster-robust fixed effects, fixed effects with heteroscedasticity-robust SE, within estimator with robust inference	HC robust regression, White robust OLS, sandwich estimator OLS, OLS with robust standard errors
Liên quan	5	6
Tóm tắt	The robust fixed effects model combines the within-group estimator for panel data with variance-covariance matrices that remain valid under heteroscedasticity and within-unit error correlation. Introduced by Arellano (1987), cluster-robust standard errors paired with the fixed effects estimator are now the default approach for credible panel data inference in economics and social science.	Robust OLS applies ordinary least squares to estimate coefficients and then replaces the classical standard errors with heteroscedasticity-consistent (HC) standard errors — commonly called White standard errors. This leaves the point estimates unchanged while yielding valid t-statistics and confidence intervals even when the error variance is not constant across observations.