방법 비교

	구조적 분할 ARCH 모형	ARCH 모형 (자기회귀 조건부 이분산성)
분야	계량경제학	계량경제학
계열	Regression model	Regression model
기원 연도	1982–1990	1982
창시자	Engle (1982) for ARCH; Lamoureux & Lastrapes (1990) for break-adjusted variance persistence	Robert F. Engle
유형	Volatility model with regime change	Conditional volatility model
원전	Engle, R. F. (1982). Autoregressive conditional heteroscedasticity with estimates of the variance of United Kingdom inflation. Econometrica, 50(4), 987–1007.	Engle, R. F. (1982). Autoregressive conditional heteroscedasticity with estimates of the variance of United Kingdom inflation. Econometrica, 50(4), 987–1007.
별칭	ARCH with structural breaks, break-adjusted ARCH, regime-switching ARCH, SB-ARCH	ARCH, autoregressive conditional heteroskedasticity, Engle ARCH, conditional variance model
관련	5	6
요약	The Structural Break ARCH model extends Engle's (1982) Autoregressive Conditional Heteroscedasticity framework by explicitly accounting for abrupt, permanent shifts in the conditional variance process. Ignoring structural breaks in variance causes ARCH parameters to appear spuriously persistent, so incorporating break dummies or regime-specific parameters yields more accurate volatility estimates and better model fit.	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.