Trying to Remain Positive

With inauguration day in the United States just two weeks away, it is difficult to harbor optimism about what the Trump presidency will mean for this country and for the world in realms ranging from economic progress to national security to personal liberty (as I wrote in this space one month before the November election – This is Not a Time for Political Neutrality, October 9, 2016).  In the wake of the election, expectations are no better, including in the environmental realm (as I wrote shortly after the election – What Does the Trump Victory Mean for Climate Change Policy?, November 10, 2016).  And since then, the President-elect’s announced nominations for key positions in the administration have probably eliminated whatever optimism some progressives may have been harboring.

Remarkably, the least worrisome development in regard to anticipated climate change policy may be the nomination of Rex Tillerson to become U.S. Secretary of State.  Two months ago it would have been inconceivable to me that I would write this about the CEO of Exxon-Mobil taking over the State Department (and hence the international dimensions of U.S. climate change policy).  But, think about the other likely candidates.  And unlike many of the other top nominees, Mr. Tillerson is at least an adult, and – in the past (before the election) – he had led his company to reverse course and recognize the scientific reality of human-induced climate change (unlike the President-elect), support the use of a carbon tax when and if the U.S. puts in place a meaningful national climate policy, and characterize the Paris Climate Agreement as “an important step forward by world governments in addressing the serious risks of climate change.”

It’s fair to say that it is little more than damning with faint praise to characterize this pending appointment as “the least worrisome development in regard to climate change policy,” but the reality remains.  Everything is relative.  Of course, whether Mr. Tillerson will maintain and persevere with his previously stated views on climate change is open to question.  And if he does, can he succeed in influencing Oval Office policy when competing with Scott Pruitt, Trump’s pick to run EPA, not to mention Rick Perry, Trump’s bizarre choice to become Secretary of Energy?

In the face of all this (and much else), is it possible to offer any statement of optimism or at least hope?  The answer may be found in the reality that U.S. policy – in many issue areas – consists of much more than the policies of the Federal government.  In a variety of policy realms, the states play an exceptionally important role.  One might not normally think about this in the context of addressing a global commons problem, such as climate change, but these are not normal times.

And so I will try to rescue myself from my current mental state – at least temporarily – by focusing today on policy developments in the State of California.  To do this, I offer an op-ed I recently wrote with Professor Lawrence Goulder of Stanford University, which was published in the Sacramento Bee a week before the November election.  Good policy developments at the state level are, of course, even more important now than they were then.


Sacramento Bee

October 30, 2016

New emissions targets make cap and trade the best low-cost, market-based approach

By Lawrence H. Goulder and Robert N. Stavins

This is a critical time for California’s climate policies. Recently, Gov. Jerry Brown achieved his hope of extending California’s action beyond 2020, the termination date of Assembly Bill 32. Whereas AB 32 called for reducing the state’s greenhouse gas emissions to 1990 levels by 2020, the newly signed Senate Bill 32 and AB 197 mandate an additional 40 percent reduction by 2030.

Unless these ambitious goals are pursued with the most cost-effective policy instruments, the costs could be unacceptably high. The governor’s targets make it especially important to use a low-cost, market-based approach: cap and trade.

Unfortunately, rather than increasing cap and trade’s role, recent proposals emphasize the use of less efficient, conventional policies. The environmental justice lobby supports this change, contending that emissions trading hurts low-income and minority communities by causing pollution to increase.

In fact, abandoning cap and trade would harm these communities by raising costs to businesses and thereby prices to consumers. With cap and trade, the sources able to reduce emissions least expensively take on more of the pollution-reduction effort. This lowers costs and prices.

When the environmental justice community worries about cap and trade, their concern is not about the greenhouse gas emissions that cause climate change: These gases spread evenly worldwide and have no discernible local impact. Rather, it’s about “co-pollutants,” such as nitrogen oxides, carbon monoxide and particulates, which often are emitted alongside greenhouse gases.

By reducing California’s greenhouse gas footprint, cap and trade lowers concentrations of these co-pollutants. Still, it’s possible – in theory – for co-pollutant emissions to increase in particular localities. The best defense against this possibility is to tighten existing laws that limit local air pollution. This would prohibit any trades that would violate such limits.

The environmental justice lobby’s concerns about local air pollution are justified: A new report by the U.S. Commission on Civil Rights acknowledges that low-income and minority communities face disproportionately high air pollution. The best response to this situation is to strengthen existing local pollution laws rather than abandon cap and trade.

Moreover, it is not clear that cap and trade shifts local air pollution toward low-income communities. One recent report from the University of Southern California identified emission increases and blamed them on cap and trade. But increased emissions have been due mainly to economic and population growth. And although emissions from some sources did increase, they decreased at 70 percent of facilities, according to mandatory reporting to the Air Resources Board.

The key question, however, is not how emission levels changed, but rather how cap and trade contributed to the change. Without cap and trade, it is likely that any increases in emissions would have been even greater.

Beyond the environmental impacts, it’s important to consider economic impacts on these communities. Reducing greenhouse gas emissions tends to raise costs of energy and transportation. Because low-income households devote greater shares of their income to energy and transportation than high-income households, virtually any climate policy places greater burdens on those households. Cap and trade minimizes these costs.

Further, cap and trade offers the government a powerful tool for compensating low-income communities for such economic burdens. Most emission allowances are auctioned and pursuant to SB 535, 25 percent of the proceeds go to projects that provide benefits to disadvantaged communities. This has already amounted to over $158 million.

Cap and trade serves the goal of environmental justice better than the alternatives, and it deserves a central place in the arsenal of weapons California uses to address climate change. Rather than step away from this progressive policy, the state should increase its reliance on this progressive, market-based approach.

Lawrence H. Goulder is a professor in environmental and resource economics at Stanford University and former chair of the AB 32 Economic and Allocation Advisory Committee to the California Air Resources Board. Contact him at

Robert N. Stavins is a professor of business and government at the Harvard Kennedy School of Government, and contributed to assessment reports to the Intergovernmental Panel on Climate Change. Contact him at

Market Mechanisms in the Paris Climate Agreement: International Linkage under Article 6.2

The Harvard Project on Climate Agreements hosted a research workshop in Cambridge, Massachusetts, on July 14–15, 2016, the purpose of which was to identify options for elaborating and implementing the Paris Climate Agreement, and to identify policies and institutions that might complement or supplement the United Nations Framework Convention on Climate Change (UNFCCC) process.  We were motivated by our recognition that while the Paris Agreement sets forth an innovative and potentially effective policy architecture for dealing with global climate change, a great deal remains to be done to elaborate the accord, formulate required rules and guidelines, and specify means of implementation.

Participants in the workshop – International Climate Change Policy after Parisincluded twenty-one of the world’s leading researchers focusing on climate-change policy, representing the disciplines of economics, political science, international relations, and legal scholarship. They came from Argentina, Belgium, China, Germany, India, Italy, Norway, the United Kingdom, and the United States.  (A list of workshop participants is here, biographies here, and the agenda here.)

The Harvard Project will next focus on communicating the ideas, insights, and recommendations of workshop participants to climate negotiators and policy makers, in the expectation that they might prove useful in elaborating and implementing the Paris Agreement. Each participant is preparing a brief—based largely on her or his presentation during the workshop. These briefs, together with a workshop summary, will be conveyed to participants in the Twenty-Second Conference of the Parties (COP-22) of the UNFCCC in Marrakech, Morocco in November 2016.  This will be done in meetings with negotiators representing UNFCCC member governments and in a side-event panel at COP-22.

Today I wish to share with readers just one of these draft briefs – namely, my own – on the topic of “International Linkage under Article 6.2 of the Paris Agreement.”

A Key Challenge for Sustained Success of the Paris Agreement

For sustained success of the international climate regime, a key question is whether the Paris Agreement with its Intended Nationally Determined Contributions (INDCs), anchored as they are in domestic political realities, can progressively lead to submissions with sufficient ambition?  Are there ways to enable and facilitate increased ambition over time?

Linkage of regional, national, and sub-national policies can be part of the answer. By “linkage,” I mean connections among policy systems that allow for emission reduction efforts to be redistributed across systems. Such linkage is typically framed as being between two (or more) cap-and-trade systems, but national policies will surely be highly heterogeneous under the Paris climate regime.  Fortunately, research – by Gilbert Metcalf of Tufts University and David Weisbach of the University of Chicago – indicates that linkage between pairings of various types of domestic policy instruments may be feasible.

Linkage and the Paris Agreement

Experience indicates that linkage will bring both merits and concerns in most applications.  To begin with the good news, linkage offers a number of important advantages. First, it offers the possibility of achieving cost savings if marginal abatement costs are heterogeneous across jurisdictions, which they surely are. In addition, linkage can improve the functioning of individual markets by reducing market power, and by reducing price volatility, although we should recognize that price volatility will also be transmitted from one jurisdiction to another by linkage. Finally linkage can allow for the UNFCCC’s important principle of Common but Differentiated Responsibilities (CBDR), but do so without sacrificing cost-effectiveness.

The possibility of linkage also raises concerns, including that there will be distributional impacts within jurisdictions, that is, the creation of both winners and losers. Also, linkage can bring about the automatic propagation from one jurisdiction to another of some design elements, in particular, cost-containment mechanisms, such as banking, borrowing, and price collars. In this and other ways, linkage raises concerns about decreased autonomy.

Linkage under Article 6.2 of the Paris Agreement

It was by no means preordained that the Paris Agreement would allow, let alone encourage, international linkage.  Fortunately, the negotiations which took place in Paris in December, 2015, produced an Agreement that includes in its Article 6.2 the necessary building blocks for linkages to occur.

Under Article 6.2, emissions reductions occurring outside of the geographic jurisdiction of a Party to the Agreement can be counted toward achieving that Party’s Nationally Determined Contribution (NDC) via Internationally Transferred Mitigation Outcomes (ITMOs).  This enables both the formation of “clubs” or other types of coalitions, as well as bottom-up heterogeneous linkage.  Such linkage among Parties to the Agreement would provide for exchanges between compliance entities within the jurisdictions of two different Parties, not simply the government-to-government trading (of Assigned Amounts or AAUs), as was the case with the Kyoto Protocol’s Article 17.

Linkage among Heterogeneous Nationally Determined Contributions

There are three types of heterogeneity which are important in regard to linkage under Article 6.2 of the Paris Agreement. First is heterogeneity among policy instruments. As demonstrated by Metcalf and Weisbach (see above), not only can one cap-and-trade system be linked with another cap-and-trade system, but it is also possible to link a cap-and-trade system with a carbon tax system. In addition, either a cap-and-trade system or a tax system can be linked (via appropriate offsets) with a performance standard in another jurisdiction.  (Linkage with systems employing technology standards are not feasible, however, because such systems are not output-based.)

A second form of heterogeneity that affects linkage and is potentially very important under the Paris Agreement is heterogeneity regarding the level of government action of the relevant jurisdictions. Although the Paris Agreement has as Parties both regional jurisdictions (in the case of the European Union) and national jurisdictions, sub-national jurisdictions are also taking action in some parts of the world. In fact, linkage has already been established between the state of California in the United States and the provinces of Québec and Ontario in Canada.

A third form of relevant heterogeneity is with regards to the NDC targets themselves.  Some are in the form of hard (mass–based) emissions caps, while others are in the form of rate-based emissions caps, either emissions per unit of economic activity, or emissions per unit of output (such as per unit of electricity production). There are also relative mass-based emissions caps in the set of existing NDCs, such as those that are relative to business-as-usual emissions in a specific future year.  Beyond these, there are other parties that have put forward NDCs that do not involve emission caps at all, but rather targets in terms of some other metric, such as the degree of penetration of renewable energy sources.

Combinations of various options under these three forms of heterogeneity yield a considerable variety of types of potential linkages, which may be thought of as the cells of a three-dimensional matrix.  Not all of these cells, however, represent linkages which are feasible, let alone desirable.

The Path Ahead – Key Issues and Questions

There are a substantial number of issues that negotiators will eventually need to address, and likewise, there are a set of questions that researchers (including within the Harvard Project on Climate Agreements) can begin to address now. Among the key issues for negotiators will be the necessity to develop accounting procedures and mechanisms. Also, it will be important to identify means for the ITMOs to be tracked in order to avoid double-counting of emissions reductions. And a broader question is whether and how the UNFCCC Secretariat or some other designated institution will provide any oversight that may be required.

For research, three questions stand out.  First, among pairings from the (3-D matrix) set of instrument–jurisdiction–target combinations that emerge from the three types of heterogeneity identified above, which linkages will actually be feasible?  Second, within this feasible set, are some types of linkages feasible, but not desirable? And third, what accounting treatments and tracking mechanisms will be necessary for these various types of linkages?  Future research will need to focus on these and related questions in order to achieve the potential benefits of Article 6.2 of the Paris Agreement.  Please stay tuned as this work develops.

Can the WTO Take a Lesson from the Paris Climate Playbook?

As readers will know from my previous entry at this blog (“Paris Agreement — A Good Foundation for Meaningful Progress”, December 12, 2015), I was busy with presentations and meetings during the 21st Conference of the Parties (COP-21) of the United Nations Framework Convention on Climate Change (UNFCCC) in Paris last December. However, I did have time to reflect on the process that was leading to the then-emerging Paris Agreement, including a series of discussions with my Harvard colleague – Professor Robert Lawrence, a leading international trade economist –who was back in Cambridge.

He and I realized that negotiators in a very different realm – international trade – could benefit from observing the progress that was being made in the international climate policy realm in Paris. This led to a co-authored op-ed that appeared in the Boston Globe on December 7, 2015 (“What the WTO Can Learn from the Paris Climate Talks”).

For many years, climate negotiators have looked longingly at how the World Trade Organization (WTO) was able to negotiate effective international agreements. But ironically, the Paris climate talks and the WTO negotiations, which were set to take place the following week in Nairobi, lead to the opposite conclusion. Trade negotiators can now emulate the progress made in the climate change agreements by moving away from a simplistic division between developed and developing countries.

For years, global climate change policy was hobbled by this division. Readers of this blog will be familiar with this issue. In the Kyoto Protocol, only developed countries committed to emissions reductions. Developing countries had no obligations. The stark demarcation made meaningful progress impossible, partly because the growth in emissions since the Protocol came into force in 2005 has been entirely in the large developing countries. Even if developed countries were to eliminate their CO2 emissions completely, the world cannot reduce the pace of climate change unless countries such as China, India, Brazil, Korea, South Africa, Mexico, and Indonesia take meaningful action.

The WTO negotiations, launched in 2001 in Doha, have remained at an impasse because of similar problems. They are tied up because nearly all the obligations assumed by WTO members depend upon whether they claim to be developed or developing. And since countries are allowed to self-designate, countries such as Singapore, South Korea, and the Gulf oil states seek to be treated the same as Ghana, Zambia, and Pakistan.

When developing countries accounted for a relatively small share of world trade, it was easy to grant all of them special treatment. But it has become impossible for developed countries to agree to additional liberalization without meaningful market-opening concessions by the large emerging economies, which will account for the majority of world trade growth in the future. Even though some have already liberalized unilaterally, many of these countries avoid making concessions at the WTO by claiming treatment as developing nations.

In the climate arena, the big break came in Durban, South Africa, in 2011, when countries agreed to achieve an outcome that was applicable to all parties. In Paris, the countries of the world adopted the Paris Agreement, which includes: bottom-up elements in the form of Intended Nationally Determined Contributions (INDCs) – national targets and actions that arise from domestic policies and circumstances; and top-down elements for oversight, guidance, and coordination. Now all countries are involved in protecting the climate system “on the basis of equity and in accordance with their common but differentiated responsibilities and respective capabilities.”

Whereas the current commitment period of the Kyoto Protocol covers countries (Europe and New Zealand) that account for no more than 14 percent of global emissions (and zero percent of global emissions growth), INDCs submitted for the Paris agreement cover 186 countries, representing 96 percent of global emissions. This dramatic, path-breaking expansion of the scope of participation is the key reason for optimism about the Paris Agreement.

In the trade sphere, a similarly nuanced approach with differentiated responsibilities that reflect different capabilities could be adopted by the WTO. Instead of all countries having to subscribe as either developed or developing countries, the WTO could finally move beyond the North-South divide that is embodied in almost every draft proposed in the current Doha round.

The climate talks have shown that simplistic classifications of countries are a prescription for impasse. Robert Lawrence and I concluded that unless the WTO learns this lesson, it may become increasingly irrelevant, as coalitions of the willing turn to regional agreements to make what progress they can on international trade liberalization.