Roach, Martin2023-11-032023-11-032023http://hdl.handle.net/20.500.12127/7281The European Union’s ambition to be climate neutral by 2050 implies an unprecedented transformation of the energy system to substantially reduce the use of fossil energy sources. Economists have identified several potential simultaneous market imperfections – market failures, policy failures, and political economy constraints – to consider that may provide an economic rationale for introducing several climate and energy related policies. Market failures in electricity markets are widely studied in academic literature. Still, insufficient attention has been given to describe potential market failures in a future decarbonized energy system characterized by increased sector coupling and renewable gas technologies. This dissertation assesses renewable gas policies using economic analysis to substantiate the presence of a market failure or evaluate either the costs or benefits of market interventions in response to a market failure, thereby highlighting the need for or impact of second-best solutions. In each chapter of this dissertation, we apply a stylized numerical case study to simulate an energy system using techno-economic input data and inform the policy assessment.enRenewable GasDecarbonizationSectoral Integration221988