A new framework for climate policy: why carbon pricing is not enough

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photo Newtown grafitti

photo Newtown grafitti

It is often argued, especially by representatives from the energy sector, that climate change policy should be based exclusively on carbon pricing. In the EU this means: on the EU Emission Trading Scheme. However, a new book by Professor Michael Grubb convincingly shows why such a policy approach is misguided. We also need policies on energy efficiency and renewables as well as policies that drive system change.

There is a widely held narrative for climate policy that runs something like this.  The costs of damage due to greenhouse gas emissions are not reflected in economic decisions.  This needs to be corrected by imposing a price on carbon, using the power of markets to incentivise efficient emissions reduction across diverse sources.  Carbon pricing needs to be complemented by measures to address other market failures, such as under-provision of R&D and lack of information.  Correcting such market failures can help carbon markets function more efficiently over time.  However further interventions, especially attempts by governments to pick winners or impose regulations mandating specific solutions, are likely to waste money.

This narrative, even if I have caricatured it a little, grants markets a central role with other policies in a supporting role.  Its application is evident, for example, amongst those in Europe who stress and exclusive or central role for the EUETS.

While this narrative rightly recognises the important role that markets can play in efficient abatement, it is incomplete to the point that it is likely to be misleading as a guide to policy.  A better approach has recently been characterised in a new book, Planetary Economics, by Professor Michael Grubb of the Cambridge University Centre for Climate Change Mitigation Research, and co-authors.  He divides policy into three pillars which conform to three different domains of economic behaviour.  Action to address all three domains is essential if efforts to reduce emissions to the extent necessary to avoid dangerous climate change are to succeed.  These domains and the corresponding policy pillars are illustrated in the chart below.

Three domains of economic behaviour correspond to three policy pillars 

Adam Whitmore Michael Grubb graphic

In the first domain people seek to satisfy their needs, but once this is done they don’t necessarily go further to achieve an optimum.  Although such behaviour is often characterised by economists as potentially optimal subject to implicit transaction costs this is not a very useful framework.  Much better is to design policy drawing on disciplines such as psychology, the study of social interactions, and behavioural economics.  This domain of behaviour relates particularly to individuals’ energy use, and the corresponding policy pillar includes instruments such as energy efficiency standards and information campaigns.

The second domain looks at optimising behaviour, where companies and individuals will devote significant effort to seeking the best financial outcome.  This is the domain where market instruments such as emissions trading have the most power.  Policy making here can draw strongly on neoclassical economics.

The third domain is system transformation, and requires a more active role from governments and other agencies to drive non-incremental change.  The policy pillar addressing this domain of behaviour includes instruments for technology development, the provision of networks, energy market design, and design and enforcement of rules to monitor and govern land use changes such as deforestation.  Markets may have a part to play but the role of governments and other bodies is central here.  The diversity of policies addressing this domain means that it draws on a wide range of disciplines, including the study of governance, technology and industrial policy, institutional economics and evolutionary economics.

planetary economicsAs one moves from the first to the third domain there typically is increasing scale of action, from individuals through companies to whole societies, and time horizons typically lengthen.

Simple and rich

This framework has a number of strengths.  It is both simple in outline and immensely rich in its potential detail.  Each domain has sound theoretical underpinnings from relevant academic disciplines.  It acknowledges the power of markets without giving them an exclusive or predominant role – they become one of three policy pillars.  It implies that the vocabulary of market failures becomes unhelpful, as I’ve previously argued.  Instead policy is framed as a wide ranging endeavour where the use of markets fits together with a range of other approaches.  While this may seem obvious to many, the advocacy of markets as a solution to policy problems has become so pervasive, especially in Anglo-Saxon economies, that this broader approach stands as a very useful corrective to an excessively market-centric approach.

The framework is high level, and specific policy guidance needs to draw on more detailed analysis.  The authors have managed to write 500 pages of not the largest print without exhausting the subject.  However, the essential framework is admirable in its simplicity, compelling in its logic, and helpful even at a high level.  For example it suggests that EU policy is right to include energy efficiency, emissions trading and renewables – broadly first, second and third domain policies respectively – as well as to be active in third domain measures such as improving interconnection, rather than relying exclusively on emissions trading (although as the EU ETS covers larger emitters, so first domain effects are less relevant for the covered sector).

The framework in itself does not tell you what needs to be done.  In particular the challenges of the third domain are formidable.  But it provides a perspective which deserves to become a standard structure for high level guidance on policy development.

Editor’s Note

This article was first published by Adam Whitmore on his blog On Climate Change Policy, under the title Making climate change policies fit their own domain,  and is republished here with permission.


  1. Jake Smit says

    Carbon pricing is a good option if the objective is to reduce consumption of fossil fuels so what is left will last longer.
    However if the idea is to reduce greenhouse gas warming potential and pollution we should also look at what the alternatives are producing.
    With the production of solar panels NF3 (16000 x warming potential of CO2) and SF6 (23000 x CO2) are blasted into the atmosphere.
    The rare earth mining for the wind turbine magnets leave a lasting legacy of tailing ponds containing all sorts of hazardous and radio active waste. But for Europe and the US that is not a problem as most of that is processed in China. (out of sight out of mind).
    Perhaps time to compare like with like and take the blinkers away.

  2. says

    The framework is commendable from a purely theoretical point of view. If we had something approaching end-user cost-parity between fossil fuels and renewables, then a framework like this can certainly work to move the fulcrum (so to speak) a moderate amount and accelerate a move from incumbent energy technology to alternatives.

    However, from the perspective of the everyday end user, moving to a carbon-neutral alternative often involves cost choices which are orders of magnitude more expensive, and which are significantly less convenient to use than current fossil fuel based technology.

    Until renewables close that gap significantly, policy changes will not have sufficient leverage economically or socially to affect significant changes in behavior.


  1. […] A new framework for climate policy: beyond carbon pricing By Adam Whitmore, Energy Post, 26 March 2015 It is often argued, especially by representatives from the energy sector, that climate change policy should be based exclusively on carbon pricing. In the EU this means: on the EU Emission Trading Scheme. However, a new book by Professor Michael Grubb convincingly shows why such a policy approach is misguided. We also need policies on energy efficiency and renewables as well as policies that drive system change. […]

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