قارن الطرق

	نموذج الانحدار الذاتي المتجه الهيكلي ذي المعاملات المتغيرة زمنيًا (TVP-SVAR)	نموذج الانحدار الذاتي المتجه البايزي (BVAR)
المجال	الاقتصاد القياسي	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	2005	1984
صاحب الطريقة	Giorgio E. Primiceri	Doan, Litterman & Sims
النوع	Bayesian state-space SVAR	Multivariate time-series model
المصدر التأسيسي	Primiceri, G. E. (2005). Time varying structural vector autoregressions and monetary policy. Review of Economic Studies, 72(3), 821–852.	Doan, T., Litterman, R., & Sims, C. (1984). Forecasting and conditional projection using realistic prior distributions. Econometric Reviews, 3(1), 1–100.
الأسماء البديلة	TVP-SVAR, time-varying SVAR, drifting-parameter SVAR, TVP structural VAR	BVAR, Bayesian VAR, Bayesian vector autoregressive model, BVAR model
ذات صلة	2	5
الملخص	The Time-Varying Parameter Structural VAR (TVP-SVAR) model extends classical structural VARs by allowing both the reduced-form coefficients and the structural impact matrix to evolve continuously over time. Estimated via Bayesian MCMC, it captures shifting transmission mechanisms and heteroscedastic volatility — making it the workhorse for empirical macroeconomics when policy regimes and economic relationships change.	The Bayesian Vector Autoregression (BVAR) model extends the classical VAR framework by incorporating prior beliefs about the model coefficients. Priors — most commonly the Minnesota prior — shrink VAR coefficients toward economically sensible values, dramatically reducing overfitting and improving out-of-sample forecast accuracy even when the number of variables is large.