Asymmetric effect of exchange rate changes on cross-border trade in Nigeria

Abstract

Abstract This paper investigates the asymmetric effect of exchange rate changes on cross-border trade in Nigeria. The investigation becomes necessary because several studies have reported insignificant results in attempting to establish a link between these two variables using symmetric specification. Whereas, there are strong evidence of nonlinear mean-reverting association because some exchange rate changes of the same magnitude exhibit different effects on other variables of interest. Having separated the real effective exchange rate into both depreciation and appreciation regimes using the partial sum processes based on logistic smooth-transition and exponential smooth-transition, results from the nonlinear autoregressive distributed lags show that exchange rate appreciation had a statistically significant negative relationship with cross-border trade in Nigeria. The study concludes that the relationship between real effective exchange rate and cross-border trade is asymmetric. (Depreciation and appreciation of equal magnitude do not have the same effect on cross-border trade in Nigeria.) The study recommends that policy makers should consider models that allow a nonlinear adjustment of exchange rates which may produce outcomes supporting an effective devaluation or appreciation policy, at least against some trading partners.

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