The Effects of Inflation on International Trade Dynamics in South Africa

Inflation remains a critical macroeconomic variable shaping South Africa’s international trade competitiveness. This study investigates the long- and short-run effects of inflation on trade balance dynamics and export-import performance. It hypothesizes that inflation significantly influences international trade by altering exchange rates, foreign direct investment, and competitiveness. Data were analyzed using Augmented Dickey-Fuller unit root tests, Johansen cointegration tests, and an Autoregressive Distributed Lag (ARDL) model to capture both short- and long-term relationships. The analysis utilized 1990–2021 secondary data from the World Bank and the South African Revenue Service, covering variables such as inflation, exports, imports, exchange rates, GDP growth, manufacturing output, and FDI. Results reveal that a 1% increase in inflation is associated with a 0.45 correlation with trade balance and a 5.53% short-run decline in trade balance deficit, though these effects were statistically insignificant. ARDL estimates show imports exert a strong negative influence (coefficient = –1.104, p < 0.01), while exports positively contribute to the balance (coefficient = 1.033, p < 0.001), explaining 83.07% of the trade balance variance. Johansen tests indicate two cointegrating relationships among variables, underscoring persistent long-term linkages between inflation and trade metrics. These findings highlight the need for stable inflation targeting and exchange rate management to strengthen South Africa’s trade performance and open prospects for future research integrating structural reforms and sectoral shocks.