RT Journal Article T1 The purchasing power parity hypothesis tested once again: new empirical evidence for 28 OECD countries A1 Boundi Chraki, Fahd A1 Mateo Tomé, Juan Pablo AB The present study is aimed at examining the validity of the purchasing power parity hypothesis for 28 OECD countries over the period 1960Q1-2021Q4. To reach this goal, we apply three methods evaluating whether the real exchange rates are stationary: The traditional unit root tests in time series, the panel unit root tests, and nonlinear unit root tests based on OLS and GLS detrending. The findings suggest that the purchasing power parity hypothesis does not hold even if the assessment considers nonlinear adjustment. PB Universidad Nacional Autónoma de México SN 0185-1667 YR 2022 FD 2022-09-29 LK https://hdl.handle.net/20.500.14352/104626 UL https://hdl.handle.net/20.500.14352/104626 LA eng NO Boundi-Chraki, F., & Mateo Tomé, J. P. (2022). The purchasing power parity hypothesis tested once again. New empirical evidence for 28 OECD Countries. Investigación Económica, 81(322), 3–26. https://doi.org/10.22201/fe.01851667p.2022.322.82892 DS Docta Complutense RD 11 abr 2025