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Transmission of prices and price volatility in Australian electricity spot markets: A multivariate GARCH analysis: Discussion Paper No 114

Worthington, Andrew C., Kay-Spratley, Adam, & Higgs, Helen (2002) Transmission of prices and price volatility in Australian electricity spot markets: A multivariate GARCH analysis: Discussion Paper No 114. [Working Paper]

Abstract

This paper examines the transmission of spot electricity prices and price volatility among the five Australian electricity markets in the National Electricity Market (NEM): namely, New South Wales (NSW), Queensland (QLD), South Australia (SA), the Snowy Mountains Hydroelectric Scheme (SNO) and Victoria (VIC). A multivariate generalised autoregressive conditional heteroskedasticity (MGARCH) model is used to identify the source and magnitude of spillovers. The results indicate the presence of positive own mean spillovers in only a small number of markets and no mean spillovers between any of the markets. This appears to be directly related to the limitations of the present system of regional interconnectors. Nevertheless, the large number of significant ownvolatility and cross-volatility spillovers in all five markets indicates the presence of strong ARCH and GARCH effects. Contrary to evidence from studies in North American electricity markets, the results also indicate that Australian electricity spot prices are stationary.

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ID Code: 522
Item Type: Working Paper
Additional URLs:
Keywords: spot electricity price markets, mean and volatility spillovers, multivariate GARCH
ISSN: 1324-5910
Subjects: Australian and New Zealand Standard Research Classification > ECONOMICS (140000) > APPLIED ECONOMICS (140200) > Financial Economics (140207)
Divisions: Current > QUT Faculties and Divisions > QUT Business School
Copyright Owner: Copyright 2002 (please consult author)
Deposited On: 08 Nov 2004
Last Modified: 02 Feb 2012 19:44

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