手法を比較

	構造的ブレーク GLS (Structural Break GLS)	構造的ブレーク加重最小二乗法（Structural Break WLS）
分野	計量経済学	計量経済学
系統	Regression model	Regression model
提唱年	1998 (structural break GLS formalization)	1998 (break framework); WLS long-established
提唱者	Bai & Perron (1998); GLS framework by Aitken (1936)	Bai & Perron (structural break framework); WLS classical
種類	Regression estimator	Weighted regression with regime shifts
原典	Bai, J., & Perron, P. (1998). Estimating and testing linear models with multiple structural changes. Econometrica, 66(1), 47–78.	Bai, J., & Perron, P. (1998). Estimating and testing linear models with multiple structural changes. Econometrica, 66(1), 47-78.
別名	GLS with structural breaks, break-adjusted GLS, structural change GLS, regime-switching GLS	WLS with structural change, break-corrected WLS, segmented WLS, structural break weighted regression
関連	6	5
概要	Structural Break GLS combines Generalized Least Squares estimation with explicit allowance for regime shifts in the data-generating process. The method estimates separate coefficient vectors for each segment defined by detected break dates while correcting for non-spherical errors — heteroscedasticity or autocorrelation — that frequently accompany structural change, yielding consistent and efficient estimates across all regimes.	Structural Break WLS combines Weighted Least Squares estimation with explicit detection and correction for structural breaks — abrupt regime shifts — in the data. By identifying break points and assigning observation-level weights that account for heteroscedasticity within and across regimes, the estimator delivers consistent, efficient coefficient estimates even when the error variance changes dramatically at a break.