Jämför metoder

	Modell för strukturella brott i EGARCH	EGARCH-modellen (Exponential GARCH)
Ämnesområde	Ekonometri	Ekonometri
Familj	Regression model	Regression model
Ursprungsår	1990–1991	1991
Upphovsperson	Nelson (1991) for EGARCH; Lamoureux and Lastrapes (1990) for break-augmented GARCH variants	Daniel B. Nelson
Typ	Volatility model with structural breaks	Volatility / conditional variance model
Ursprungskälla	Nelson, D. B. (1991). Conditional heteroskedasticity in asset returns: A new approach. Econometrica, 59(2), 347–370.	Nelson, D. B. (1991). Conditional heteroskedasticity in asset returns: A new approach. Econometrica, 59(2), 347–370.
Alias	SB-EGARCH, EGARCH with regime shifts, break-adjusted EGARCH, structural change EGARCH	Exponential GARCH, EGARCH, Nelson EGARCH, log-GARCH
Närliggande	5	6
Sammanfattning	Structural Break EGARCH combines Nelson's Exponential GARCH framework with explicit allowance for one or more structural breaks in the volatility process. By letting the intercept and persistence parameters of the log-variance equation shift at detected break dates, the model avoids the spurious long-memory and inflated persistence that standard EGARCH suffers when the data contain regime changes.	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.