قارن الطرق

	Panel GARCH model	نموذج ARCH (الانحراف المعياري الشرطي الذاتي الانحدار)
المجال	الاقتصاد القياسي	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	1986 (GARCH); panel extension 1990s–2000s	1982
صاحب الطريقة	Bollerslev (1986); extended to panel settings in subsequent literature	Robert F. Engle
النوع	Volatility model	Conditional volatility model
المصدر التأسيسي	Bollerslev, T. (1986). Generalized autoregressive conditional heteroskedasticity. Journal of Econometrics, 31(3), 307–327.	Engle, R. F. (1982). Autoregressive conditional heteroscedasticity with estimates of the variance of United Kingdom inflation. Econometrica, 50(4), 987–1007.
الأسماء البديلة	panel GARCH, GARCH panel model, panel volatility model, panel conditional heteroscedasticity model	ARCH, autoregressive conditional heteroskedasticity, Engle ARCH, conditional variance model
ذات صلة	6	6
الملخص	The Panel GARCH model extends Bollerslev's (1986) Generalized Autoregressive Conditional Heteroscedasticity framework to panel data, allowing conditional variance to evolve over time for each cross-sectional unit. It simultaneously captures unit-level heterogeneity and time-varying volatility clustering, making it the standard tool for modelling risk and uncertainty in multi-entity financial and macroeconomic panels.	The ARCH model, introduced by Robert Engle in 1982, captures time-varying volatility in financial and macroeconomic time series. It models the conditional variance of today's error as a function of past squared errors, explaining why volatile periods cluster together — a phenomenon known as volatility clustering.