手法を比較

	時変パラメータSVARモデル (TVP-SVAR)	ベイズ型VARモデル（BVAR）
分野	計量経済学	計量経済学
系統	Regression model	Regression model
提唱年	2005	1984
提唱者	Giorgio E. Primiceri	Doan, Litterman & Sims
種類	Bayesian state-space SVAR	Multivariate time-series model
原典	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.
別名	TVP-SVAR, time-varying SVAR, drifting-parameter SVAR, TVP structural VAR	BVAR, Bayesian VAR, Bayesian vector autoregressive model, BVAR model
関連	2	5
概要	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.