مقایسهٔ روش‌ها

	آزمون ریشه واحد فوریه ژیووت-اندروز	آزمون ریشه واحد فورייה ADF
حوزه	اقتصادسنجی	اقتصادسنجی
خانواده	Regression model	Regression model
سال پیدایش	2012	2006-2012
پدیدآور	Enders & Lee (2012), extending Zivot & Andrews (1992)	Becker, Enders, and Lee; Enders and Lee
نوع	Unit root test with smooth structural break	Unit root test with smooth structural breaks
منبع بنیادین	Enders, W., & Lee, J. (2012). A unit root test using a Fourier series to approximate smooth breaks. Oxford Bulletin of Economics and Statistics, 74(4), 574-599.	Becker, R., Enders, W., & Lee, J. (2006). A stationarity test in the presence of an unknown number of smooth breaks. Journal of Time Series Analysis, 27(3), 381-409.
نام‌های دیگر	Fourier ZA test, FZA unit root test, Fourier structural break unit root test, smooth structural break ADF test	Fourier ADF test, FADF test, Flexible Fourier ADF, Fourier-based ADF unit root test
مرتبط	6	6
خلاصه	The Fourier Zivot-Andrews test extends the classic Zivot-Andrews (1992) unit root test by replacing sharp, single structural break dummies with a low-frequency Fourier approximation, allowing the test to accommodate smooth, gradual, and multiple unknown breaks in the level or trend of a series.	The Fourier ADF unit root test extends the standard Augmented Dickey-Fuller framework by incorporating low-frequency Fourier terms into the deterministic component. This allows the test to approximate smooth, gradual structural breaks in the level or trend of a time series without requiring prior knowledge of break number, timing, or form.