So sánh phương pháp

	Mô hình Panel GARCH	Mô hình EGARCH (Exponential GARCH)
Lĩnh vực	Kinh tế lượng	Kinh tế lượng
Họ	Regression model	Regression model
Năm ra đời	1986 (GARCH); panel extension 1990s–2000s	1991
Người khởi xướng	Bollerslev (1986); extended to panel settings in subsequent literature	Daniel B. Nelson
Loại	Volatility model	Volatility / conditional variance model
Công trình gốc	Bollerslev, T. (1986). Generalized autoregressive conditional heteroskedasticity. Journal of Econometrics, 31(3), 307–327.	Nelson, D. B. (1991). Conditional heteroskedasticity in asset returns: A new approach. Econometrica, 59(2), 347–370.
Tên gọi khác	panel GARCH, GARCH panel model, panel volatility model, panel conditional heteroscedasticity model	Exponential GARCH, EGARCH, Nelson EGARCH, log-GARCH
Liên quan	6	6
Tóm tắt	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 Exponential GARCH (EGARCH) model, introduced by Nelson (1991), extends the standard GARCH framework by modelling the logarithm of conditional variance. This ensures variance is always positive without parameter constraints and, crucially, allows negative and positive shocks to have asymmetric effects on volatility — capturing the well-known leverage effect in financial markets.