قارن الطرق

	نموذج الانحدار الذاتي المتجه (VAR) مع الانقطاعات الهيكلية	الانحدار الذاتي الهيكلي المتجه (SVAR)
المجال	الاقتصاد القياسي	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	1980–1998	1980
صاحب الطريقة	Bai & Perron (structural breaks); Sims (VAR framework)	Sims (1980); identification schemes by Blanchard & Quah (1989)
النوع	Multivariate time series model with regime change	Multivariate time series model
المصدر التأسيسي	Bai, J., & Perron, P. (1998). Estimating and testing linear models with multiple structural changes. Econometrica, 66(1), 47–78.	Blanchard, O. J., & Quah, D. (1989). The dynamic effects of aggregate demand and supply disturbances. American Economic Review, 79(4), 655-673.
الأسماء البديلة	VAR with structural breaks, break-point VAR, regime-switching VAR, SB-VAR	SVAR, structural vector autoregression, identified VAR, structural VAR model
ذات صلة	6	5
الملخص	The Structural Break VAR model extends the standard Vector Autoregression (VAR) framework by allowing coefficient matrices and error covariance to shift at one or more unknown break dates. It is designed for multivariate time series where economic relationships change abruptly due to policy shifts, financial crises, or major structural events.	Structural VAR extends the reduced-form VAR by imposing economic theory-based restrictions that identify orthogonal structural shocks. This allows researchers to disentangle the causal effects of distinct economic disturbances — such as supply versus demand shocks — and trace their dynamic propagation through a system of variables via impulse response functions and forecast error variance decompositions.