Krahasoni metodat

	Testi i rrënjës njësi Phillips-Perron për Panele	Test i rrënjës njësi ADF për panele
Fusha	Ekonometri	Ekonometri
Familja	Regression model	Regression model
Viti i origjinës	1988 (original PP); panel adaptation widely established by 2003	2002–2003
Krijuesi	Phillips & Perron (1988); panel extension by Im, Pesaran & Shin (2003)	Im, Pesaran & Shin (2003); Levin, Lin & Chu (2002)
Lloji	Nonparametric unit root test	Unit root / stationarity test
Burimi themelues	Im, K. S., Pesaran, M. H., & Shin, Y. (2003). Testing for unit roots in heterogeneous panels. Journal of Econometrics, 115(1), 53-74.	Im, K. S., Pesaran, M. H., & Shin, Y. (2003). Testing for unit roots in heterogeneous panels. Journal of Econometrics, 115(1), 53–74.
Emërtime të tjera	Panel PP test, Phillips-Perron panel unit root, Im-Pesaran-Shin PP panel test, panel nonparametric unit root test	Panel ADF test, IPS test, Im-Pesaran-Shin test, panel unit root test
Të lidhura	6	6
Përmbledhja	The Panel PP unit root test extends the nonparametric Phillips-Perron correction for serial correlation to a multi-individual panel setting. It tests the null hypothesis that all cross-sectional units contain a unit root, using a pooled or averaged PP-type statistic that is robust to heteroscedastic and serially correlated errors without requiring explicit lag selection.	The Panel Augmented Dickey-Fuller (Panel ADF) unit root test extends the classical ADF framework to panel datasets. By pooling information across cross-sectional units it achieves substantially higher power than single-series ADF tests, allowing researchers to determine whether time-series variables are stationary or integrated of order one before modelling long-run relationships.