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1. Navigating the Crises in European Energy

Author:
Michael Grubb
Publication Date:
09-2022
Content Type:
Working Paper
Institution:
Institute for New Economic Thinking (INET)
Abstract:
The energy crisis engulfing Europe is a crisis of both gas and electricity markets, with huge cost impacts on consumers across all European countries. In Britain, half of typical household energy expenditure arises from electricity. This paper examines how the cost of gas-powered generation feeds through to electricity bills, on the principle of marginal cost pricing, setting the price for most of the time though it accounts for only about 40% of GB generation. Combined with the steep decline in wind and solar costs over the past decade, this has resulted in an unprecedented degree of ‘cost inversion’ in the electricity system. We offer estimates of the increase of revenues across the wholesale market, and outline five principles for reform for addressing the combined challenges of energy costs and accelerating low-carbon transition.
Topic:
Climate Change, Energy Policy, Environment, Green Technology, and Energy Crisis
Political Geography:
Global Focus

2. Separating electricity from gas prices through Green Power Pools: Design options and evolution

Author:
Michael Grubb and Drummond Pike
Publication Date:
11-2022
Content Type:
Working Paper
Institution:
Institute for New Economic Thinking (INET)
Abstract:
This paper develops a detailed proposal for an efficient way to channel the value of large-scale renewables, which have become much cheaper than gas-driven wholesale electricity prices, to consumers at ‘cost-plus’ prices. This would reduce the fiscal pressure on governments for market- wide subsidies and offer more stable support for consumers most in need. We detail how this ‘green power pool’ approach could interact with the wholesale market to ensure firm power, also bringing transparency to the cost of balancing the variable renewables output, and maintaining incentives for efficient supply and demand responses. We illustrate the approach with reference to the cost and volume trajectories of UK renewables backed by government CfDs, targeted initially to particular consumer groups, as a first step in a wider transition towards direct consumer access to cheap renewables.
Topic:
Climate Change, Energy Policy, Green Technology, Renewable Energy, and Energy Crisis
Political Geography:
United Kingdom and Europe

3. Modeling Myths: On the Need for Dynamic Realism in DICE and other Equilibrium Models of Global Climate Mitigation

Author:
Claudia Wieners and Michael Grubb
Publication Date:
01-2020
Content Type:
Working Paper
Institution:
Institute for New Economic Thinking (INET)
Abstract:
We analyze and critique how optimizing Integrated Assessment Models, and specifically the widely-used DICE model, represent abatement costs. Many such models assume temporal independence –abatement costs in one period are not affected by prior abatement. We contrast this with three dimensions of dynamic realism in emitting systems: inertia, induced innovation, and path dependence. We extend the DICE model with a stylized representation of such dynamic factors. By adding a transitional cost component, we characterize the resulting system in terms of its capacity to adapt in path-dependent ways, and the transitional costs of accelerating abatement. We formalize a resulting metric of the pliability of the system, and the characteristic timescales of adjustment. With the resulting DICE-PACE model, we show that in a system with high pliability, the optimal strategy involves much higher initial investment in abatement, sustained at roughly constant levels for some decades, which generates an approximately linear abatement path and emissions declining steadily to zero. This contrasts sharply with the traditional formulation. Characteristic transition timescales of 20-40 years result in an optimum path which stabilizes global temperatures around a degree below the traditional DICE behavior; with otherwise modest assumptions, a pliable system can generate optimal scenarios within the goals of the Paris Agreement, with far lower long run combined costs of abatement and climate damages. We conclude that representing dynamic realism in such models is as important as – and far more empirically tractable than – continued debate about the monetization of climate damages and ‘social cost of carbon’.
Topic:
Climate Change, Economics, Paris Agreement, and Models
Political Geography:
Global Focus