手法を比較

	非線形ADF単位根検定（KSS検定）	Zivot-Andrews構造変化検定
分野	計量経済学	計量経済学
系統	Regression model	Regression model
提唱年	2003	1992
提唱者	Kapetanios, Shin, and Snell	Eric Zivot and Donald W. K. Andrews
種類	Nonlinear unit root test	Unit root test with endogenous structural break
原典	Kapetanios, G., Shin, Y., & Snell, A. (2003). Testing for a unit root in the nonlinear STAR framework. Journal of Econometrics, 112(2), 359-379.	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.
別名	KSS test, nonlinear unit root test, ESTAR unit root test, Kapetanios-Shin-Snell test	ZA test, Zivot-Andrews unit root test, endogenous structural break unit root test, ZA structural break test
関連	6	6
概要	The Nonlinear ADF unit root test, most prominently operationalized by Kapetanios, Shin, and Snell (2003), extends the classical Augmented Dickey-Fuller test to detect mean reversion that occurs via an Exponential Smooth Transition Autoregressive (ESTAR) process. It tests the null of a unit root against a nonlinear stationary alternative, capturing adjustment dynamics that the standard linear ADF test misses.	The Zivot-Andrews (ZA) test is a unit root test that endogenously identifies the most likely location of a single structural break in a time series. Unlike the standard ADF test, it does not require the researcher to pre-specify when the break occurred, making it robust to data-driven regime shifts such as policy changes, financial crises, or major economic events.