The consensus is that price stability promotes sustainable economic growth while excessive inflation harms growth. This study assesses the linkage between inflation and economic growth in South Africa to determine the optimal inflation rate threshold for the sustainable growth of the economy. Quarterly data from 1995 to 2022 was analysed through the ARDL and threshold regressions. The ARDL and threshold regressions estimate established a relationship between inflation and economic growth and computed the optimal inflation rate threshold for economic growth at 6 percent. The results also established that both the repo rate (repurchase rate) and real effective exchange rate have a negative relationship with economic growth. The Toda-Yamamoto causality test result indicated a unidirectional causality runs from inflation to economic growth. These results are crucial for the South African Reserve Bank to discharge its monetary policy functions to attain and maintain price stability. Therefore, this study offers the Bank a roadmap for targeting an inflation rate that aligns with the nation’s long-term objectives for sustainable economic growth.

Abdulqadir, I. A., Chua, S. Y., & Mohd, S. (2020). Investigation of optimal inflation targets for 15 major oil exporting Sub-Saharan African countries. Journal of Economics, Finance and Administrative Science, 25(49), 45–60. https://doi.org/10.1108/jefas-12-2018-0136

Adeniyi, F. O. (2020). Impact of foreign direct investment and inflation on economic growth of five randomly selected Countries in Africa. Journal of Economics and International Finance, 12(2), 65–73. https://doi.org/10.5897/jeif2020.1031

Ahmed, S. & Mortaza, G. (2010). Inflation and Economic Growth in Bangladesh: 1981–2005, Working Papers id:3033. eSocialSciences.

Anyanwu, F., Ananwude, A., & Okoye, N. (2017). Exchange Rate Policy and Nigeria’s Economic Growth: A Granger Causality Impact Assessment. International Journal of Applied Economics, Finance and Accounting, 1(1), 1–13. https://doi.org/10.33094/8.2017.11.1.13

Arestis, P. (1996). Post-Keynesian economics: towards coherence. Cambridge Journal of Economics, 20(1), 111–135. https://doi.org/10.1093/oxfordjournals.cje.a013604

Atesoglu, H. S. (1999). Inflation: conflicted claims approach, in O’Hara. PA Encyclopedia of Political Economy: AK.

Azam, M., & Khan, S. (2022). Threshold effects in the relationship between inflation and economic growth: Further empirical evidence from the developed and developing world. International Journal of Finance & Economics, 27(4), 4224–4243. Portico. https://doi.org/10.1002/ijfe.2368

Billi, R.M., & Kahn, G.A. (2008). What is the optimal inflation rate? Federal Reserve Bank of Kansas City Economic Review, 93(2), 5–28.

Bittencourt, M., van Eyden, R., & Seleteng, M. (2015). Inflation and Economic Growth: Evidence from the Southern African Development Community. South African Journal of Economics, 83(3), 411–424. Portico. https://doi.org/10.1111/saje.12075

Blanchard, O. J. (1991). Neoclassical synthesis. In: The world of economics. London: Palgrave Macmillan UK.

Bodenstein, M., Guerrieri, L., & LaBriola, J. (2019). Macroeconomic policy games. Journal of Monetary Economics, 101, 64–81. https://doi.org/10.1016/j.jmoneco.2018.07.015

Can, U., Bocuoglu, M. E., & Can, Z. G. (2020). How does the monetary transmission mechanism work? Evidence from Turkey. Borsa Istanbul Review, 20(4), 375–382. https://doi.org/10.1016/j.bir.2020.05.004

Das, A., & Loxley, J. (2015). Non-linear relationship between inflation and growth in developing countries. Economic and Political Weekly, 50(37), 59–64.

De Gregorio, J. (1996). Inflation, growth, and central banks: theory and evidence, Policy Research Working Paper Series 1575. The World Bank: Washington DC.

Dickey, D.A. & Fuller, W.A. (1975). Distribution of the estimators for autoregressive time series with a unit root. Journal of American Statistical Association, 74, 427–431.

Doan Van, D. (2020). Money supply and inflation impact on economic growth. Journal of Financial Economic Policy, 12(1), 121–136. https://doi.org/10.1108/JFEP-10-2018-0152

Eichner, A. S., & Kregel, J. A. (1975). An essay on post-Keynesian theory: a new paradigm in economics. Journal of Economic Literature, 13(4), 1293–1314.

Freeman, S. (1993). Resolving Differences over the Optimal Quantity of Money. Journal of Money, Credit and Banking, 25(4), 801. https://doi.org/10.2307/2077807

Frimpong, J. M., & Oteng-Abay, E. F. (2010). When is Inflation Harmful? Estimating the Threshold Effect for Ghana. American Journal of Economics and Business Administration, 2(3), 232–239. https://doi.org/10.3844/ajebasp.2010.232.239

Galbraith, J. K. (1997). Time to Ditch the NAIRU. Journal of Economic Perspectives, 11(1), 93–108. https://doi.org/10.1257/jep.11.1.93

Habanabakize, T., & Meyer, D.F. (2018). An investigation of the dynamic effect of foreign direct investment (FDI) and interest rates on GDP in South Africa. Journal of Economics and Behavioral Studies, 10(5J), 29–37.

Harcourt, G. C. (2006). The structure of post-Keynesian economics: the core contributions of the pioneers. In: Keynes for the Twenty-First Century: The Continuing Relevance of The General Theory. Palgrave Macmillan US.

Hassan, A. S. (2021). Foreign aid and economic growth in Nigeria: The role of institutional quality. Studies of Applied Economics, 39(3). https://doi.org/10.25115/eea.v39i3.4108.

Hassan, A., & Meyer, D. (2020a). Analysis of the non-linear effect of petrol price changes on inflation in South Africa. International Journal of Social Sciences and Humanity Studies, 12(1), 34–49.

Hassan, A. S., & Meyer, D. F. (2020b). Non-Linear Effect of External Debt on Economic Growth: Evidence from Sub-Saharan African Countries. International Journal of Economics & Management, 14(3), 447–460. https://doi.org/10.3390/su11133635.

Hassan, A., & Meyer, D. (2021). Exploring the Channels of Transmission between External Debt and Economic Growth: Evidence from Sub-Saharan African Countries. Economies, 9(2), 50. https://doi.org/10.3390/economies9020050

Ibarra, R., & Trupkin, D. R. (2016). Reexamining the relationship between inflation and growth: Do institutions matter in developing countries? Economic Modelling, 52, 332–351. https://doi.org/10.1016/j.econmod.2015.09.011

Isaac, A. G. (1999). Inflation: conflicted claims approach, in O’Hara. PA Encyclopedia of Political Economy: AK.

Khan, M. S., & Senhadji, A. S. (2001). Threshold Effects in the Relationship between Inflation and Growth. IMF Staff Papers, 48(1), 1–21. https://doi.org/10.2307/4621658

Khan, M. A., & Khan, S. (2018). Inflation and the economic growth: evidence from Five Asian Countries. Pakistan Journal of Applied Economics, 28(2), 235–252.

Kotsokoane, K., & Rena, R. (2021). Inflation Targeting and Economic Growth in South Africa: An Econometric Analysis. Acta Universitatis Danubius: Oeconomica, 17(3), 161–180.

Kremer, S., Bick, A., & Nautz, D. (2013). Inflation and growth: new evidence from a dynamic panel threshold analysis. Empirical Economics, 44(2), 861–878. https://doi.org/10.1007/s00181-012-0553-9

Kryeziu, N., & Durguti, E. A. (2019). The Impact of Inflation on Economic Growth. International Journal of Finance & Banking Studies (2147-4486), 8(1), 01–09. https://doi.org/10.20525/ijfbs.v8i1.297

Leshoro, T. L. A. (2012). Estimating the Inflation Threshold for South Africa. Studies in Economics and Econometrics, 36(2), 53–66. https://doi.org/10.1080/10800379.2012.12097238

Madurapperuma, W. (2016). Impact of inflation on economic growth in Sri Lanka. Journal of World Economic Research, 5(1), 1–7.

Mallik, G. and Chowdhury A. (2001). Inflation and Economic Growth: Evidence from Four Asian Countries. Asia-Pacific Development Journal, 8(1), 123–135.

Mandeya, S. M. T., & Ho, S.-Y. (2021). Inflation, inflation uncertainty and the economic growth nexus: An impact study of South Africa. MethodsX, 8, 101501. https://doi.org/10.1016/j.mex.2021.101501

Mankiw, N.G. (2019). Macroeconomics, 10th ed. Worth Publishers.

Masiyandima, N., Ngundu, T., Kupeta, K., Moyo, P. S., & Ngwenya, S. (2018). Optimal inflation for Zimbabwe. R BZ Working Paper Series No.1 2018, Harare: Reserve Bank of Zimbabwe.

Mishchenko, V., Naumenkova, S., & Mishchenko, S. (2021). Assessing the efficiency of the monetary transmission mechanism channels in Ukraine. Banks and Bank Systems, 16(3), 48–62. http://dx.doi.org/10.21511/bbs.16(3).2021.05

Mudenda, C., Choga, I., & Chigamba, C. (2014). The role of export diversification on economic growth in South Africa. Mediterranean Journal of Social Sciences, 5(9), 705. https://doi.org/10.5901/mjss.2014.v5n9p705

Munir, Q., Mansur, K. and Furuoka, F. (2009). Inflation and economic growth in Malaysia: a threshold regression approach. ASEAN Economic Bulletin, 26(2), 180–193. https://doi.org/10.1353/ase.0.0049

Ndoricimpa, A. (2017). Threshold Effects of Inflation on Economic Growth: Is Africa Different? International Economic Journal, 31(4), 599–620. https://doi.org/10.1080/10168737.2017.1380679

Olamide, E., Ogujiuba, K., & Maredza, A. (2022). Exchange Rate Volatility, Inflation and Economic Growth in Developing Countries: Panel Data Approach for SADC. Economies, 10(3), 67. https://doi.org/10.3390/economies10030067

Pesaran, M. H., Shin, Y., & Smith, R. J. (2001). Bounds testing approaches to the analysis of level relationships. Journal of Applied Econometrics, 16(3), 289–326. Portico. https://doi.org/10.1002/jae.616

Phetwe, M. and Molefhe, L. (2016). Inflation and economic growth: estimation of a threshold level of inflation in Botswana. Research and Financial Stability Department Bank of Botswana, 29, 1, 12.

Phillips, P.C.B. & Perron, P. (1988). Testing for a unit root in time series regression. Biometrika, 75(2), 335–346. https://doi.org/10.1093/biomet/75.2.335

Phiri, A. (2018). Nonlinear impact of inflation on economic growth in South Africa: a smooth transition regression analysis. International Journal of Sustainable Economy, 10(1), 1. https://doi.org/10.1504/ijse.2018.088624

Pollin, R., & Zhu, A. (2006). Inflation and economic growth: a cross-country nonlinear analysis. Journal of Post Keynesian Economics, 28(4), 593–614. https://doi.org/10.2753/pke0160-3477280404

Precious, C., Bahle, M., & Praise, G. (2014). Impact of financial liberalisation on economic growth: A case study of South Africa. Mediterranean Journal of Social Sciences, 5(23), 238. https://doi.org/10.5901/mjss.2014.v5n23p238

Sahnoun, M., & Abdennadher, C. (2019). Causality between inflation, economic growth and unemployment in North African countries. Economic Alternatives, 1, 77–92.

SARB. (2022). South African Reserve Bank: Monetary Policy Review, July. South African Reserve Bank.

Sekwati, D., & Dagume, M. A. (2023). Effect of Unemployment and Inflation on Economic Growth in South Africa. International Journal of Economics and Financial Issues, 13(1), 35. https://doi.org/10.32479/ijefi.13447.

Sibanda, K., Ncwadi, R., & Mlambo, C. (2013). Investigating the Impacts of Real Exchange Rates on Economic Growth: A Case study of South Africa. Mediterranean Journal of Social Sciences, 4(13), 261. https://doi.org/10.5901/mjss.2013.v4n13p261

Smith, B. D. (2002). Monetary Policy, Banking Crises, and the Friedman Rule. American Economic Review, 92(2), 128–134. https://doi.org/10.1257/000282802320189122

Solow, R. M. (1956). A Contribution to the Theory of Economic Growth. The Quarterly Journal of Economics, 70(1), 65. https://doi.org/10.2307/1884513

Stiglitz, J., Ocampo, J. A., Spiegel, S., et al. (2006). Stability with growth: macroeconomics, liberalisation and development. OUP Oxford.

Stockman, A. C. (1981). Anticipated inflation and capital stock in a cash-in-advance economy. Journal of Monetary Economics, 8(3), 387–393. https://doi.org/10.1016/0304-3932(81)90018-0.

Summers, L. (1991). Panel Discussion: Price Stability: How Should Long-Term Monetary Policy Be Determined? Journal of Money, Credit and Banking, 23(3), 625. https://doi.org/10.2307/1992697

Swan, T. W. (1956). Economic growth and capital accumulation. Economic Record, 32(2), 334–361. Portico. https://doi.org/10.1111/j.1475-4932.1956.tb00434.x

Tarawalie, A. (2010). Real exchange rate behaviour and economic growth: evidence from Sierra Leone. South African Journal of Economic and Management Sciences, 13(1), 8–25. https://doi.org/10.4102/sajems.v13i1.195

Totonchi, J. (2011). Macroeconomic Theories of Inflation. In: Proceedings of the 2011 International Conference on Economics and Finance Research.

Vinayagathasan, T. (2013). Inflation and economic growth: A dynamic panel threshold analysis for Asian economies. Journal of Asian Economics, 26, 31–41. https://doi.org/10.1016/j.asieco.2013.04.001

Weintraub, S. (1978) Capitalism’s Inflation and Unemployment Crisis: beyond Monetarism and Keynesianism, Addison-Wesley.

Woodford, M. (1990) The optimum quantity of money. In: Friedman, B. and Hahn, F. (editors). Handbook of Monetary Economics. North-Holland.

World Bank. (2022). World Development Indicators. World Bank: Washington DC.

Yonus, S. (2012). Estimating growth-inflation trade off threshold in Bangladesh. Policy Analysis Unit, Research Department, Bangladesh Bank, Working Paper.