The markets for network-based products and services pose particular problems with regard to competition. The transition from monopolistic to competitive structures and the issues of infrastructure sharing, dominant players and network externalities have all been subject to intensive debates....

The paper assesses the distributional and efficiency/disincentive aspects of the Greek indirect tax system, which provides 60% of total tax revenue. The marginal welfare costs of broad commodity groups were computed to identify welfare-improving directions of reform. The disincentive effects...

Russia's invasion of Ukraine was a wake-up call for Europe regarding its unhealthy levels of dependence on the energy and metals fronts, and the associated threats this posed to its competitiveness. Meanwhile, the need to decarbonize the economy has become ever more pressing. Soon after the...

Only by decarbonizing its economy and reducing energy and raw-material dependencies can the EU safeguard its competitiveness in the global markets. Postponing policies to decarbonize the energy system will increase long-run welfare losses. Decarbonization offers great potential for improving...

Given the agreed urgency of decarbonizing electricity and the need to guide decentralized private decisions, an adequate and credible carbon price appears essential. The paper models and quantifies the useful concept of the break-even carbon price for mature zerocarbon electricity investments....

The theory of road pricing developed for single links suggests time andlocation varying charges equal to the marginal congestion cost at the efficientlevel of traffic. The second-best network counterpart is derived, but would beinfeasible to implement. Cordon tolls are feasible, and their...

The supply function equilibrium provides a game-theoretic model of strategic bidding in oligopolistic wholesale electricity auctions. This paper presents an intuitive account of current understanding and shows how welfare losses depend on the number of firms in the market and their asymmetry....

In most wholesale electricity markets generators must submit step-function offers of supply to a uniform price auction, and the market is cleared at the price of the most expensive offer needed to meet realised demand. Such markets can most elegantly be modelled as the pure-strategy, Nash...