방법 비교

	강건 벡터 자기회귀 (Robust VAR) 모형	Quantile VAR
분야	계량경제학	계량경제학
계열	Regression model	Regression model
기원 연도	1980s–2000s	2006
창시자	Extensions by Lutkepohl and others building on Sims (1980) VAR framework	Koenker and Xiao
유형	Multivariate time-series model with robust estimation	Distribution impulse response
원전	Goncalves, S., & Kilian, L. (2004). Bootstrapping autoregressions with conditional heteroskedasticity of unknown form. Journal of Econometrics, 123(1), 89-120.	Koenker, R., & Xiao, Z. (2006). Quantile autoregression. Journal of the American Statistical Association, 101(475), 980-990.
별칭	robust VAR, outlier-robust VAR, heavy-tailed VAR, RVAR	Quantile-based impulse response
관련	5	3
요약	The Robust VAR model extends the classical Vector Autoregression framework by replacing ordinary least squares estimation with robust estimators — such as M-estimators or median-based methods — to reduce the influence of outliers, structural breaks, and heavy-tailed shocks common in financial and macroeconomic time series.	Quantile VAR estimates impulse responses of multivariate systems conditional on different quantiles of the distribution, revealing how shocks propagate heterogeneously across the conditional distribution. Introduced by Koenker and Xiao (2006) and applied to risk measurement by White et al. (2015), it reveals tail behavior and contagion effects invisible to mean-based VAR analysis. This is essential for risk management and understanding how crises propagate differently than normal times.