Consumption effects of an electricity decarbonization policy: Hong Kong
2018
Woo, C.K. | Shiu, A. | Liu, Y. | Luo, X. | Zarnikau, J.
This paper estimates the consumption effects of an electricity rate increase triggered by an electricity decarbonization policy's implementation. Underscoring its real-world relevance is the policy's net impact on CO₂ emissions, the sum of (a) the supply-side impact attributable to using generation resources with low emissions to displace those with high emissions, and (b) the demand-side impact caused by energy consumption changes in response to the electricity rate increase. For Hong Kong, the changes in (b) are decreases in electricity consumption and increases in town gas consumption. Using a sample of monthly data for the period of 1981–2016, we document the low price responsiveness of Hong Kong's electricity and town gas demands by customer class (residential, commercial and industrial). Hence, the 40% projected electricity rate increase due to Hong Kong's adopted electricity decarbonization policy may only have a small demand-side impact on CO₂ emissions. Finally, the electricity demands' low price responsiveness has two important policy implications. First, Hong Kong's demand-side-management should rely more on energy-efficiency improvements than price-induced consumption reductions. Second, restructuring Hong Kong's electricity industry to introduce wholesale competition should consider the potential for large electricity price spikes and market power abuse in connection to price-inelastic electricity demands.
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