قارن الطرق

	نموذج الانحدار الذاتي المتجهي غير الخطي (Nonlinear VAR Model)	الانحدار الذاتي الهيكلي المتجه (SVAR)
المجال	الاقتصاد القياسي	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	1990s–2000s	1980
صاحب الطريقة	Tsay (1998); Krolzig (1997); Tong (1990) for threshold framework	Sims (1980); identification schemes by Blanchard & Quah (1989)
النوع	Multivariate nonlinear time series model	Multivariate time series model
المصدر التأسيسي	Tsay, R. S. (1998). Testing and modeling multivariate threshold models. Journal of the American Statistical Association, 93(443), 1188–1202.	Blanchard, O. J., & Quah, D. (1989). The dynamic effects of aggregate demand and supply disturbances. American Economic Review, 79(4), 655-673.
الأسماء البديلة	NLVAR, nonlinear vector autoregression, threshold VAR, TVAR	SVAR, structural vector autoregression, identified VAR, structural VAR model
ذات صلة	4	5
الملخص	The Nonlinear VAR (NLVAR) model extends the standard vector autoregression by allowing the dynamic relationships among multiple time series to switch or change smoothly depending on an observed threshold variable, a latent regime state, or a smooth transition function. It is used when economic systems exhibit asymmetric responses, regime shifts, or state-dependent dynamics that a linear VAR cannot capture.	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.