قارن الطرق

	اختبار Zivot-Andrews للكسر الهيكلي والجذر الوحدوي	اختبار التكامل المشترك لإنجل-جرانجر
المجال	الاقتصاد القياسي	الاقتصاد القياسي
العائلة	Regression model	Regression model
سنة النشأة	1992	1987
صاحب الطريقة	Eric Zivot and Donald W. K. Andrews	Robert F. Engle and Clive W. J. Granger
النوع	Unit root test with endogenous structural break	Cointegration test
المصدر التأسيسي	Zivot, E., & Andrews, D. W. K. (1992). Further evidence on the great crash, the oil-price shock, and the unit-root hypothesis. Journal of Business & Economic Statistics, 10(3), 251–270.	Engle, R. F., & Granger, C. W. J. (1987). Co-integration and error correction: Representation, estimation, and testing. Econometrica, 55(2), 251–276.
الأسماء البديلة	Zivot-Andrews test, ZA unit root test, endogenous structural break unit root test, ZA breakpoint test	EG cointegration test, Engle-Granger two-step method, residual-based cointegration test, EG test
ذات صلة	6	5
الملخص	The Zivot-Andrews test is an endogenous structural break unit root test that determines the break point from the data rather than imposing it externally. It tests for a unit root against the alternative of stationarity around a single structural break — in the mean, the trend, or both — choosing the break date that provides the strongest evidence against the null.	The Engle-Granger two-step method tests whether two or more non-stationary I(1) time series share a common stochastic trend — that is, whether a linear combination of them is stationary. If cointegration is confirmed, an error-correction model (ECM) can be estimated to capture both short-run dynamics and long-run equilibrium adjustment.