قارن الطرق

	الأخطاء المعيارية القوية للعناقيد	نموذج التأثيرات الثابتة لبيانات السلاسل الزمنية المقطعية
المجال	الإحصاء	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	1986	2014
صاحب الطريقة	Liang & Zeger (GEE sandwich); Cameron & Miller (practitioner synthesis)	Hsiao (textbook treatment); within transformation of panel data
النوع	Robust variance estimation for regression	Panel data regression
المصدر التأسيسي	Liang, K. Y. & Zeger, S. L. (1986). Longitudinal Data Analysis Using Generalized Linear Models. Biometrika, 73(1), 13-22.	Hsiao, C. (2014). Analysis of Panel Data (3rd ed.). Cambridge University Press.
الأسماء البديلة	clustered standard errors, cluster-robust inference, clustered variance estimator, Küme Robust Standart Hatalar	fixed effects model, within estimator, panel fixed-effects regression, Panel Veri — Sabit Etkiler Modeli
ذات صلة	4	5
الملخص	Cluster-robust standard errors correct the variance of regression coefficients when observations are correlated within clusters such as schools, hospitals, or regions. The clustered sandwich estimator grew out of Liang & Zeger's (1986) generalized estimating equations and was synthesized for applied work by Cameron & Miller (2015), delivering valid inference when ordinary standard errors would be too small.	The Panel Data Fixed Effects model estimates relationships from panel data (the same units observed over several time periods) while controlling for unit- and/or time-specific effects, supporting causal inference. It is developed as the within estimator in standard treatments such as Hsiao's Analysis of Panel Data (2014).