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	अरेखीय EGARCH मॉडल	थ्रेशोल्ड GARCH (TGARCH) मॉडल
क्षेत्र	अर्थमिति	अर्थमिति
परिवार	Regression model	Regression model
उद्भव वर्ष	1991	1993-1994
प्रवर्तक	Daniel B. Nelson	Zakoian (1994); Glosten, Jagannathan & Runkle (1993)
प्रकार	Conditional volatility model	Asymmetric volatility model
मौलिक स्रोत	Nelson, D. B. (1991). Conditional heteroskedasticity in asset returns: A new approach. Econometrica, 59(2), 347–370.	Zakoian, J.-M. (1994). Threshold heteroskedastic models. Journal of Economic Dynamics and Control, 18(5), 931-955.
उपनाम	NL-EGARCH, nonlinear exponential GARCH, asymmetric EGARCH, NEGARCH	Threshold GARCH, TGARCH, GJR-GARCH, asymmetric GARCH
संबंधित	5	6
सारांश	The Nonlinear EGARCH model extends Nelson's (1991) Exponential GARCH by allowing the news impact function to take a flexible nonlinear form, capturing asymmetric and nonlinear responses of conditional volatility to past shocks. It is widely used in financial econometrics to model leverage effects and complex volatility dynamics in asset returns.	The Threshold GARCH (TGARCH) model extends the standard GARCH framework by allowing positive and negative return shocks to have asymmetric effects on conditional variance. Negative shocks — bad news — typically amplify volatility more than positive shocks of the same magnitude, a stylised fact known as the leverage effect. TGARCH captures this asymmetry through a threshold indicator that switches on when the previous period's shock was negative.