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SUMMARY:Interactions Between Emissions Trading Systems and Other Policies: Insights from Theory and an Application to China
DESCRIPTION:Jurisdictions that rely on emissions trading to control emissions often utilize other environmental or energy policies as well\, including policies to support renewable energy and improve energy efficiency. Overlapping policies produce economic interactions that can lead to quite different outcomes from what one might predict after examining the individual policies separately. Prior literature has focused on how overlapping policies might affect outcomes under cap-and-trade (CAT) systems\, where aggregate emissions are fixed by regulation but emissions prices respond. However\, jurisdictions are increasingly turning to alternative forms of emissions markets\, including a range of rate-based emissions trading systems\, in which both emissions quantities and prices are flexible and the significance of policy interactions is less understood.\nThis paper extends the literature by considering the implications of overlaps for a range of ETSs\, including not only CAT but also several forms of tradable performance standards (TPSs). We consider a variety of overlapping policies\, including subsidies to renewables and taxes on electricity. We present analytical results that reveal how outcomes differ\, depending on the type of the ETS and the given overlaps. We then describe and apply a numerical general equilibrium model that offers quantitative results in the context of China.\nOur analytical model finds that an overlapping subsidy to renewable energy—which has no effect on emissions under a CAT system—increases emissions when the ETS is a uniform\, sector-wide TPS\, and decreases emissions when the ETS is a TPS that covers only emissions-intensive sources\, excluding clean ones from participating in credit trading. With CAT\, adding an overlapping renewables subsidy or electricity consumption tax has efficiency costs. Under certain TPSs\, however\, these measures can reduce distortions and enhance cost-effectiveness.\nOur numerical model offers quantitative assessments of the impacts of overlaps on emissions\, production\, prices\, and costs\, under both China’s currently planned TPS and alternative policy.
URL:https://test.whatworksclimate.solutions/presentation/interactions-between-emissions-trading-systems-and-other-policies-insights-from-theory-and-an-application-to-china/
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