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The evolution of price elasticity of electricity demand in South Africa: A Kalman filter application

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  • Inglesi-Lotz, R.

Abstract

In South Africa, the electricity mismatch of supply and demand has been of major concern. Additional to past problems, the 2008 electricity crisis made the solution crucial after its damaging consequences to the economy. The disagreement on the need and consequences of the continuous electricity price hikes worsens the situation. To contribute to the recent electricity debate, this paper proposes a time-varying price elasticity of demand for electricity; the sensitivity of electricity consumption to price fluctuations changes throughout the years. The main purpose of this study is the estimation of the price elasticity of electricity in South Africa during the period 1980-2005 by employing an advanced econometric technique, the Kalman filter. Apart from the decreasing effect of electricity prices to consumption (-71.8% in the 1990s and -94.5% in the 2000s in average), our results conclude to an important finding: the higher the prices (for example in the 1980s) the higher the sensitivity of consumers to price fluctuations. Thus, further increases of the electricity prices may lead to changes in the behaviour of electricity consumers, focusing their efforts on improving their efficiency levels by introducing demand-side management techniques or even turning to other sources of - cheaper - energy.

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  • Inglesi-Lotz, R., 2011. "The evolution of price elasticity of electricity demand in South Africa: A Kalman filter application," Energy Policy, Elsevier, vol. 39(6), pages 3690-3696, June.
  • Handle: RePEc:eee:enepol:v:39:y:2011:i:6:p:3690-3696
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    2. Adom, Philip Kofi, 2017. "The long-run price sensitivity dynamics of industrial and residential electricity demand: The impact of deregulating electricity prices," Energy Economics, Elsevier, vol. 62(C), pages 43-60.
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    11. Chang, Yoosoon & Kim, Chang Sik & Miller, J. Isaac & Park, Joon Y. & Park, Sungkeun, 2014. "Time-varying Long-run Income and Output Elasticities of Electricity Demand with an Application to Korea," Energy Economics, Elsevier, vol. 46(C), pages 334-347.
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    13. Roula Inglesi-Lotz & Anastassios Pouris, 2013. "On the causality and determinants of energy and electricity demand in South Africa: A review," Working Papers 201314, University of Pretoria, Department of Economics.
    14. Mayr, Dieter & Schmid, Erwin & Trollip, Hilton & Zeyringer, Marianne & Schmidt, Johannes, 2015. "The impact of residential photovoltaic power on electricity sales revenues in Cape Town, South Africa," Utilities Policy, Elsevier, vol. 36(C), pages 10-23.
    15. Salisu, Afees A. & Ayinde, Taofeek O., 2016. "Modeling energy demand: Some emerging issues," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 1470-1480.
    16. THAMAE Retselisitsoe Isaiah & THAMAE Leboli Zachia & THAMAE Thimothy Molefi, 2015. "Dynamics Of Electricity Demand In Lesotho: A Kalman Filter Approach," Studies in Business and Economics, Lucian Blaga University of Sibiu, Faculty of Economic Sciences, vol. 10(1), pages 130-139, April.
    17. Arisoy, Ibrahim & Ozturk, Ilhan, 2014. "Estimating industrial and residential electricity demand in Turkey: A time varying parameter approach," Energy, Elsevier, vol. 66(C), pages 959-964.
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