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Estimating South Africa’s Output Gap Potential Growth Rate

This paper estimates the potential output of the South African economy using several univariate filters as well as taking a production function approach. Our aim is to compare the sensitivity of the results to the different methodologies and different measurements of output. We find that the potential output is sensitive to the different methodologies and different measures of output. A Cobb-Douglas specification of the production function is employed, dividing the economy into eight sectors. We find that the production function produced results similar to the band-pass filters but with gaps of lower amplitudes. We then use the Hodrick-Prescott, Christiano-Fitzgerald, and a Kalman filter to observe the natural growth rate of the South African economy from 1960 to 2015. We find estimates of the natural growth rate in the 1.9% – 2.3% range. However, there is also evidence to suggest that the rate is under considerable downward pressure in the post-2010 period. The strongest decline is in the real sectors of the economy (Manufacturing, Mining), the greatest resilience in the service sectors (financial in particular).

Working paper 585
1 February 2016
RELATED JOURNAL:

South African Journal of Economics
14 February 2017
SHARE THIS Working Paper PUBLICATION:
19 February 2016
Publication Type: Working Paper
JEL Code: C32, E32

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