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| Modello VAR Strutturale a Parametri Variabili nel Tempo (TVP-SVAR)× | Modello VAR Bayesiano (BVAR)× | |
|---|---|---|
| Campo | Econometria | Econometria |
| Famiglia | Regression model | Regression model |
| Anno di origine≠ | 2005 | 1984 |
| Ideatore≠ | Giorgio E. Primiceri | Doan, Litterman & Sims |
| Tipo≠ | Bayesian state-space SVAR | Multivariate time-series model |
| Fonte seminale≠ | Primiceri, G. E. (2005). Time varying structural vector autoregressions and monetary policy. Review of Economic Studies, 72(3), 821–852. DOI ↗ | Doan, T., Litterman, R., & Sims, C. (1984). Forecasting and conditional projection using realistic prior distributions. Econometric Reviews, 3(1), 1–100. DOI ↗ |
| Alias | TVP-SVAR, time-varying SVAR, drifting-parameter SVAR, TVP structural VAR | BVAR, Bayesian VAR, Bayesian vector autoregressive model, BVAR model |
| Correlati≠ | 2 | 5 |
| Sintesi≠ | 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. |
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