مقایسهٔ روش‌ها

	آزمون ایستایی KPSS	آزمون ریشه واحد فیلیپس-پرون (PP)
حوزه	اقتصادسنجی	اقتصادسنجی
خانواده	Regression model	Regression model
سال پیدایش	1992	1988
پدیدآور	Kwiatkowski, Phillips, Schmidt & Shin	Peter C. B. Phillips & Pierre Perron
نوع	Stationarity test (reverse of unit-root tests)	Unit-root test for stationarity
منبع بنیادین	Kwiatkowski, D., Phillips, P. C. B., Schmidt, P., & Shin, Y. (1992). Testing the null hypothesis of stationarity against the alternative of a unit root. Journal of Econometrics, 54(1–3), 159–178.	Phillips, P. C. B., & Perron, P. (1988). Testing for a unit root in time series regression. Biometrika, 75(2), 335–346.
نام‌های دیگر	Kwiatkowski-Phillips-Schmidt-Shin test, stationarity test, KPSS durağanlık testi	PP test, Phillips-Perron unit root test, Phillips-Perron birim kök testi
مرتبط	4	4
خلاصه	The KPSS test, introduced by Kwiatkowski, Phillips, Schmidt and Shin in 1992, tests the null hypothesis that a series is stationary against the alternative that it contains a unit root — the reverse of the ADF and Phillips-Perron tests. By flipping the burden of proof, it is designed to be used alongside unit-root tests so that the two can confirm one another and expose ambiguous, borderline cases.	The Phillips-Perron test, proposed by Peter Phillips and Pierre Perron in 1988, tests for a unit root in a time series, like the Augmented Dickey-Fuller test, but corrects for autocorrelation and heteroskedasticity in the errors non-parametrically rather than by adding lagged differences. It runs a simple Dickey-Fuller regression and then adjusts the test statistic using a long-run variance estimate, so the practitioner need not choose a lag length for the regression itself.