قارن الطرق

	نموذج التأثيرات الثابتة للكسر الهيكلي	نموذج التأثيرات العشوائية للكسر الهيكلي
المجال	الاقتصاد القياسي	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	1998 (Bai-Perron); FE estimator classical	1998–2000s
صاحب الطريقة	Bai & Perron (structural break testing); Mundlak / within-group estimator tradition	Bai & Perron (break detection); Baltagi (panel RE framework)
النوع	Panel regression with regime change	Panel regression with regime shifts
المصدر التأسيسي	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.
الأسماء البديلة	FE model with structural breaks, break-adjusted fixed effects, panel fixed effects with regime shifts, structural change fixed effects estimator	RE model with structural breaks, break-adjusted random effects, random effects break model, panel RE with regime shifts
ذات صلة	6	5
الملخص	The structural break fixed effects model extends the standard within-group (FE) panel estimator by allowing the slope coefficients to shift at one or more detected break dates. Each unit's unobserved time-invariant heterogeneity is still removed by demeaning, but separate coefficient regimes are estimated for each sub-period, capturing policy shifts, crises, or technological transitions that would otherwise bias a single-regime FE estimate.	The structural break random effects model extends standard panel RE estimation by allowing one or more breakpoints at which slope coefficients or error variances shift across time. It combines structural change detection (e.g., Bai-Perron) with the GLS-based random effects estimator, producing regime-specific parameter estimates while retaining the efficiency gains of pooling individual-level variation as random draws from a common distribution.