השוואת שיטות

	מבחן שורש יחידה פורייה-פיליפס-פרון (Fourier PP)	מבחן שורש יחידה פיליפס-פרון עם שבר מבני
תחום	אקונומטריקה	אקונומטריקה
משפחה	Regression model	Regression model
שנת המקור	2006	1988/1997
הוגה השיטה	Becker, Enders, and Lee	Pierre Perron (building on Phillips & Perron)
סוג	Unit root test with Fourier approximation	Hypothesis test
מקור מכונן	Enders, W., & Siklos, P. L. (2001). Cointegration and threshold adjustment. Journal of Business and Economic Statistics, 19(2), 166-176.	Perron, P. (1997). Further evidence on breaking trend functions in macroeconomic variables. Journal of Econometrics, 80(2), 355-385.
כינויים	Fourier PP test, Flexible Fourier PP unit root test, Enders-Lee Fourier PP test, nonlinear PP unit root test	break-augmented PP test, Phillips-Perron test with structural break, structural break unit root test, PP unit root test with break
קשורות	6	0
תקציר	The Fourier PP unit root test extends the classical Phillips-Perron test by embedding low-frequency Fourier terms in the deterministic component, enabling the test to account for an unknown number of smooth, gradual structural breaks in the level or trend without pre-specifying their timing or shape.	The structural break Phillips-Perron (PP) unit root test extends the classical PP framework to allow for one or more discrete shifts in the level or trend of a time series. By endogenously or exogenously identifying break dates and controlling for them, it tests the null of a unit root against a trend-stationary alternative that accommodates structural change, avoiding the spurious acceptance of non-stationarity caused by ignored breaks.