Módszerek összehasonlítása

	Panel EGARCH – Exponenciális GARCH paneladatokra	Panel TGARCH (Threshold GARCH paneladatokhoz)
Tudományterület	Ökonometria	Ökonometria
Módszercsalád	Regression model	Regression model
Keletkezés éve	1991 (EGARCH); panel extensions widely used from 2000s	1993–1994 (panel extension: 2000s onward)
Megalkotó	Daniel B. Nelson (EGARCH); panel extension by applied econometrics literature	Glosten, Jagannathan & Runkle (1993); Zakoian (1994); extended to panel settings by subsequent applied finance literature
Típus	Volatility model	Asymmetric conditional volatility model
Alapmű	Nelson, D. B. (1991). Conditional heteroskedasticity in asset returns: A new approach. Econometrica, 59(2), 347–370.	Glosten, L. R., Jagannathan, R., & Runkle, D. E. (1993). On the relation between the expected value and the volatility of the nominal excess return on stocks. Journal of Finance, 48(5), 1779–1801.
Alternatív nevek	Panel EGARCH model, panel exponential GARCH, EGARCH for panel data, cross-sectional EGARCH	Panel GJR-GARCH, Panel Asymmetric GARCH, Panel Threshold GARCH, TGARCH panel model
Kapcsolódó	4	4
Összefoglaló	Panel EGARCH extends Nelson's (1991) Exponential GARCH model to a panel setting, allowing conditional variance to evolve asymmetrically over time for each cross-sectional unit. The log specification ensures non-negative variance without parameter constraints, and the leverage term distinguishes whether negative shocks amplify volatility more than positive ones of equal magnitude.	Panel TGARCH extends the Threshold GARCH (GJR-GARCH) model to panel data, allowing each cross-sectional unit to exhibit asymmetric volatility responses — where negative shocks generate larger variance increases than positive shocks of the same magnitude — while exploiting the cross-sectional dimension to obtain more efficient parameter estimates.