방법 비교

	Structural Break GLS	구조적 단절 WLS (구조적 단절 보정을 포함한 가중 최소제곱법)
분야	계량경제학	계량경제학
계열	Regression model	Regression model
기원 연도	1998 (structural break GLS formalization)	1998 (break framework); WLS long-established
창시자	Bai & Perron (1998); GLS framework by Aitken (1936)	Bai & Perron (structural break framework); WLS classical
유형	Regression estimator	Weighted regression with regime shifts
원전	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.
별칭	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
관련	6	5
요약	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.