Economic activities in many sub-Saharan African (SSA) countries have weakened
markedly in the last few years, with deterioration in trade balances,
increasing foreign reserve depletion, and exchange rate depreciation. This
situation has led to a call by the International Monetary Fund for more
flexible exchange rate adjustment and even currency devaluation to reverse
the economic downturn. This call for devaluation has generated controversy
among economists and policymakers in these countries and has revived the
need to study the effects of devaluation on economic output in SSA
countries. This study therefore examines the asymmetric effects of currency
devaluation as a policy shift on economic output between 1980 and 2019 in
six selected SSA countries, namely Ghana, Kenya, Tanzania, Mozambique,
Nigeria, and Malawi. The study employs the smooth transition regression
(STR) model to determine the relative asymmetric responses of economic
output to devaluation and nondevaluation regimes. The results of STR are
mixed, as devaluation asymmetrically impacts positively and significantly on
economic output in Ghana, Kenya, Tanzania, and Mozambique, but is
insignificant in the case of Nigeria and Malawi. This mixed result suggests
that the impact of currency devaluation on economic output differs across
countries depending on the structure and size of the economy, the nature of
goods produced, and the supportive policies in place, among other things.
The policy implication of the findings is that policymakers in various
countries should understand the peculiarity of core macroeconomic variables
in order to design and implement robust policies.