Do trade frictions distort the purchasing power parity (PPP) hypothesis? A closer look

Lumengo Bonga-Bonga

MPRA Paper from University Library of Munich, Germany

Abstract: This paper explores whether trade frictions are the primary barrier preventing the Purchasing Power Parity (PPP) hypothesis from holding true between trading nations. It specifically examines the influence of exchange controls, a form of trade friction, on the relationship between an emerging economy, South Africa, and its primary trading partners, categorized based on whether they implement exchange control regulations or not. The methodology employed incorporates nonlinearity through quantile unit root tests and quantile cointegration, aiming to account for diverse economic conditions between trading nations. Empirical results suggest that the PPP hypothesis is more valid between countries with similar economic frameworks and synchronized business cycles. We propose that trade frictions might not necessarily inhibit the PPP hypothesis from being valid among nations with aligned economic structures that react similarly to global economic disturbances.

Keywords: PPP hypothesis; quantile cointegration; unit root test; exchange control. (search for similar items in EconPapers)
JEL-codes: C58 F14 F3 (search for similar items in EconPapers)
Date: 2023-11
New Economics Papers: this item is included in nep-int
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