Abstract
In this paper we consider the asymmetric effects of real effective exchange rate changes on domestic production of 13 African nations, the first comprehensive study on the topic in Africa. We find that exchange rate changes have short-run and long-run asymmetric effects on output in most countries in Africa. However, the results are country specific. In some countries a depreciation is expansionary but appreciation has no effect on output. In some countries, an appreciation hurts domestic output but a depreciation has no effects. Such findings are possible only if we separate appreciations from depreciations and adhere to nonlinear modeling.
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Notes
Note that Bahmani-Oskooee and Mohammadian (2016) also included the wage rate in their model as another factor affecting aggregate supply. However, due to lack of wage data for any of the African nations in our sample, we had to exclude wages. Indeed, most previous studies have only included the first three exogenous variables in their models. Given this limitation when wage data becomes available, future research must consider including the wage rate in the model and see how the results are affected.
The two partial sum variables are constructed as \(POS_{t} = \sum\nolimits_{j = 1}^{t} {\hbox{max} \left( {\Delta \ln REX_{j} ,0} \right)}\) and \(NEG_{t} = \sum\nolimits_{j = 1}^{t} {\hbox{min} \left( {\Delta \ln REX_{j} ,0} \right)}\). Intuitively, partial sum of positive (negative) changes at time t, is the cumulative sum of all changes prior to time t where negative (positive) changes have been replaced by zeroes.
Shin et al. (2014, p. 291).
For some other application of these methods see Bahmani-Oskooee and Zhang (2014), Gogas and Pragidis (2015), Durmaz (2015), Bahmani-Oskooee et al. (2015), Baghestani and Kherfi (2015), Al-Shayeb and Hatemi-J.(2016), Bahmani-Oskooee and Durmaz (2016), Lima et al. (2016), Nusair (2012, 2016), Aftab et al. (2017), Arize et al. (2017), Bahmani-Oskooee et al. (2017) and Gregoriou (2017).
The positive coefficient in the linear model of Zambia indicates a disequilibrium model.
Following previous research, we have used nominal price of oil to avoid any multilinearity that may exist between real oil price and real exchange rate. However, as a sensitivity analysis we also estimated each model using real price of oil. There was no significant change in our asymmetric analysis. These results are available from authors upon request.
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Appendix 1: Data definition and source
Appendix 1: Data definition and source
Sources used to collect the data:
a. IFS database
b. The Economist
c. Federal Reserve Bank of St. Louis.
d. Bahmani-Oskooee and Kones (2014).
Variables:
\(\varvec{Y}_{\varvec{i}}\) = Index of real GDP of relevant African country taken from source a above.
\(\varvec{M}_{\varvec{i}}\) = Real money supply defined as real M2. Nominal M2 figures in national currency are deflated by GDP deflator or Consumer Price Index of the relevant African country from source a and b above.
\(\varvec{G}_{\varvec{i}}\) = Real government spending. Nominal data in national currency are deflated by GDP deflator of the relevant African country from source a above.
\(\varvec{Oil}_{\varvec{i}}\) = Global crude oil prices taken from source c above.
\(\varvec{REX}_{\varvec{i}}\) = Real Effective Rate. The data come mostly from source (d). Missing periods are collected from sources a and f. By using overlapping observations, we have adjusted the data to make them compatible. By way of construction, a decline in REX reflects depreciation of domestic currency.
Quarterly data are used to carry out the empirical exercise. The list of countries and data period for each country is as follows:
Countries | Data period |
---|---|
Algeria | 1987Q4–2015Q1 |
Cameroon | 1985Q4–2014Q4 |
Ethiopia | 1986Q2–2013Q3 |
Ghana | 1985Q4–2014Q1 |
Kenya | 1985Q3–2014Q1 |
Mauritius | 1986Q2–2014Q1 |
Morocco | 1987Q3–2014Q1 |
Nigeria | 1986Q4–2015Q1 |
South Africa | 1986Q4–2016Q1 |
Tanzania | 1985Q4–2014Q1 |
Tunisia | 1985Q3–2014Q1 |
Uganda | 1993Q2–2013Q1 |
Zambia | 1992Q1–2015Q1 |
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Bahmani-Oskooee, M., Arize, A.C. Asymmetric response of domestic production to exchange rate changes: evidence from Africa. Econ Change Restruct 53, 1–24 (2020). https://doi.org/10.1007/s10644-018-9240-y
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DOI: https://doi.org/10.1007/s10644-018-9240-y