Nonlinear impact of inflation on economic growth in South Africa: A smooth transition regression (STR) analysis

Khoza, Keorapetse and Thebe, Relebogile and Phiri, Andrew (2016): Nonlinear impact of inflation on economic growth in South Africa: A smooth transition regression (STR) analysis.

Abstract

In this paper, we challenge the notion of a monotonic relationship between inflation and economic growth in South Africa. In particular, we establish threshold effects in the inflation-growth relationship using a smooth transition regression (STR) model which is applied on data collected between 1994:Q1 and 2016:Q2. Our empirical results confirm a threshold of 5.4 percent in which the effects of inflation on economic growth are positive below this threshold whereas inflation exerts adverse effect on economic growth at inflation levels above this level. In a nutshell, our study offers support in favour of the optimal level of inflation lying between the current 3-6 percent inflation target and more specifically suggests that the monetary authorities should slightly lower the upper level of this target to about 5.4 percent as a means creating a more conducive financial environment for promoting higher economic growth.

• Item Type: MPRA Paper
• Language: English
• Keywords: Inflation; Economic growth; Thresholds; Smooth transition regressions (STR); South Africa Reserve Bank (SARB).
• Subjects: C - Mathematical and Quantitative Methods > C2 - Single Equation Models ; Single Variables > C22 - Time-Series Models ; Dynamic Quantile Regressions ; Dynamic Treatment Effect Models ; Diffusion Processes; C - Mathematical and Quantitative Methods > C3 - Multiple or Simultaneous Equation Models ; Multiple Variables > C32 - Time-Series Models ; Dynamic Quantile Regressions ; Dynamic Treatment Effect Models ; Diffusion Processes ; State Space Models; C - Mathematical and Quantitative Methods > C5 - Econometric Modeling > C52 - Model Evaluation, Validation, and Selection; E - Macroeconomics and Monetary Economics > E3 - Prices, Business Fluctuations, and Cycles > E31 - Price Level ; Inflation ; Deflation; E - Macroeconomics and Monetary Economics > E5 - Monetary Policy, Central Banking, and the Supply of Money and Credit > E52 - Monetary Policy; O - Economic Development, Innovation, Technological Change, and Growth > O4 - Economic Growth and Aggregate Productivity > O40 - General

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