Economics of the Environment

The Sixth Edition of Economics of the Environment: Selected Readings has just been published by W. W. Norton & Company of New York and London.  Through five previous editions, Economics of the Environment has served as a valuable supplement to environmental economics texts and as a stand-alone book of original readings in the field of environmental economics.  Nearly seven years have passed since the previous edition of this volume was published, and it is now more than three decades since the first edition appeared, edited by Robert and Nancy Dorfman.  The Sixth Edition continues this tradition.

Motivation and Audience

Environmental economics continues to evolve from its origins as an obscure application of welfare economics to a prominent field in its own right, which combines elements from public finance, industrial organization, microeconomic theory, and many other areas of economics.  The number of articles on the environment appearing in mainstream economics periodicals continues to increase, and more and more economics journals are dedicated exclusively to environmental and resource topics.

There has also been a proliferation of environmental economics textbooks for college courses.  Many are excellent, but none can be expected to provide direct access to timely and original contributions by the field’s leading scholars.  As most teachers of economics recognize, it is valuable to supplement the structure and rigor of a text with original readings from the literature.

Scope and Style

With that in mind, this new edition of Economics of the Environment consists of thirty-four chapters that instructors will find to be of great value as a complement to their chosen text and their lectures.  The scope is comprehensive, and the list of authors is a veritable “who’s who” of environmental economics, including:  Joseph Aldy, Kenneth Arrow, Trudy Cameron, Ronald Coase, Maureen Cropper, Peter Diamond, George Eads, Jeffrey Frankel, Rick Freeman, Don Fullerton, Lawrence Goulder, John Graham, Robert Hahn, Michael Hanemann, Jerry Hausman, Steven Kelman, Nathaniel Keohane, Alan Krupnick, Lester Lave, John Livernois, Eric Maskin, Leonardo Maugeri, Gilbert Metcalf, Richard Newell, Roger Noll, William Nordhaus, Wallace Oates, Sheila Olmstead, Elinor Ostrom, Karen Palmer, Ian Parry, Carl Pasurka, Robert Pindyck, William Pizer, Michael Porter, Paul Portney, Forest Reinhardt, Richard Revesz, Milton Russell, Michael Sandel, Richard Schmalensee, Steven Shavell, Jason Shogren, Kerry Smith, Robert Solow, Nicholas Stern, Laura Taylor, Richard Vietor, and myself.

The articles are timely, with more than 90 percent published since 1990, and half since 2005.  There are two completely new sections of the book, “Economics of Natural Resources” and “Corporate Social Responsibility,” and all of the chapters in the section on global climate change are new to the sixth edition.

In order to make the readings in Economics of the Environment accessible to students at all levels, one criterion I use in the selection process is that articles should not only be original and well written — and meet the highest standards of economic scholarship — but also be non-technical in their presentations.  Hence, readers will find virtually no formal mathematics in any of the book’s 34 chapters throughout its 733 pages.

The Path Ahead

Environmental economics is a rapidly evolving field.  Not only do new theoretical models and improved empirical methods appear on a regular basis, but entirely new areas of investigation open up when the natural sciences indicate new concerns or the policy world turns to new issues.  Therefore, this book remains a work in progress.  I owe a great debt to the teachers and students of previous editions who have sent their comments and suggestions for revisions.  Looking to future editions, I invite all readers — whether teachers, students, or practitioners — to send me any thoughts or suggestions for improvement.

In the meantime, if you’re interested finding out more about the book, immediately below is a chapter-by-chapter summary of the book.  Alternatively, you can check out the W. W. Norton or Amazon web sites.

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Appendix:  A Summary of Economics of the Environment, Sixth Edition

Part I of the volume provides an overview of the field and a review of its foundations.  Don Fullerton and I start things off with a brief essay about how economists think about the environment (Nature 1998).  This is followed by the classic treatment of social costs and bargaining by Ronald Coase (Journal of Law and Economics 1960), and a new article by Jason Shogren and Laura Taylor on the important, emerging field of behavioral environmental economics (Review of Environmental Economics and Policy 2008).

The Costs of Environmental Protection

Part II examines the costs of environmental protection, which might seem to be without controversy or current analytical interest.  This is not, however, the case.  This section begins with a survey article by Carl Pasurka that reviews the theory and empirical evidence on the relationship between environmental regulation and so-called “competitiveness” (Review of Environmental Economics and Policy 2008).

A somewhat revisionist view is provided by Michael Porter and Class van der Linde, who suggest that the conventional approach to thinking about the costs of environmental protection is fundamentally flawed (Journal of Economic Perspectives 1995).  Karen Palmer, Wallace Oates, and Paul Portney provide a careful response (Journal of Economic Perspectives 1995).

The Benefits of Environmental Protection

In Part III, the focus turns to the other side of the analytic ledger — the benefits of environmental protection.  This is an area that has been even more contentious — both in the policy world and among scholars.  Here the core question is whether and how environmental amenities can be valued in economic terms for analytical purposes.

The book features a provocative debate on the stated-preference method known as “contingent valuation.”  Paul Portney outlines the structure and importance of the debate, Michael Hanemann makes the affirmative case, and Peter Diamond and Jerry Hausman provide the critique (all three articles are from the Journal of Economic Perspectives 1994).

In the final article in Part III, the book turns to a concept that is both very important in assessments of the benefits of environmental regulations and is also very widely misunderstood — the value of a statistical life.  In an insightful essay, Trudy Cameron seeks to set the record straight (Review of Environmental Economics and Policy 2010).

There are two principal policy questions that need to be addressed in the environmental realm:  how much environmental protection is desirable; and how should that degree of environmental protection be achieved.  The first of these questions is addressed in Part IV and the second in Part V.

The Goals of Environmental Policy:  Economic Efficiency and Benefit-Cost Analysis

In an introductory essay, Kenneth Arrow, Maureen Cropper, George Eads, Robert Hahn, Lester Lave, Roger Noll, Paul Portney, Milton Russell, Richard Schmalensee, Kerry Smith, and I ask whether there is a role for benefit-cost analysis to play in environmental, health, and safety regulation (Science 1996).

Then, Lawrence Goulder and I focus on an ingredient of benefit-cost analysis that non-economists seem to find particularly confusing, or even troubling — intertemporal discounting (Nature 2002).  Next, Robert Pindyck examines a subject of fundamental importance — the role of uncertainty in environmental economics (Review of Environmental Economics and Policy 2007).  Steven Kelman provides an ethically-based critique of benefit-cost analysis, which is followed by a set of responses (Regulation 1981).

Part IV concludes with an up-to-date essay by John Graham on the critical role of the U.S. Office of Management and Budget in federal regulatory impact analysis (Review of Environmental Economics and Policy 2008).

The Means of Environmental Policy:  Cost Effectiveness and Market-Based Instruments

Part V examines the policy instruments — the means — that can be employed to achieve environmental targets or goals.  This is an area where economists have made their greatest inroads of influence in the policy world, with tremendous changes having taken place over the past twenty  years in the reception given by politicians and policy makers to so-called market-based or economic-incentive instruments for environmental protection.

Lawrence Goulder and Ian Parry start things off with a broad-ranging essay on instrument choice in environmental policy (Review of Environmental Economics and Policy 2008).  Following this, I examine lessons that can be learned from the innovative sulfur dioxide allowance trading program, set up by the Clean Air Act Amendments of 1990 (Journal of Economic Perspectives 1998).  Finally, Michael Sandel provides a critique of market-based instruments, with responses offered by Eric Maskin, Steven Shavell, and others (New York Times 1997).

Economics of Natural Resources

Part VI consists of three essays on a new topic for this book — the economics of natural resources.  First, John Livernois examines the empirical significance of a central tenet in natural resource economics, namely the Hotelling Rule — the proposition that under conditions of efficiency, the scarcity rent (price minus marginal extraction cost) of natural resources will rise over time at the rate of interest (Review of Environmental Economics and Policy 2009).

Essays by Leonardo Maugeri (Review of Environmental Economics and Policy 2009) and Sheila Olmstead (Review of Environmental Economics and Policy 2010), respectively, examine two particularly important resources:  petroleum and water.

The next four sections of the book treat some timely and important topics and problems.

Corporate Social Responsibility and the Environment

Part VII examines corporate social responsibility and the environment, discussion of which has too often been characterized by more heat than light.  Forest Reinhardt, Richard Vietor, and I provide an overview of this realm from the perspective of economics, examining the notion of firms voluntarily sacrificing profits in the social interest.  In a second essay, Paul Portney provides a valuable empirical perspective (both are from the Review of Environmental Economics and Policy 2008).

Global Climate Change

Part VIII is dedicated to investigations of economic dimensions of global climate change, which may in the long term prove to be the most significant environmental problem that has arisen, both in terms of its potential damages and in terms of the costs of addressing it.  First, a broad overview of the topic is provided in a survey article by Joseph Aldy, Alan Krupnick, Richard Newell, Ian Parry, and William Pizer (Journal of Economic Literature 2010).

Next, William Nordhaus critiques the well-known Stern Review on the Economics of Climate Change, and Nicholas Stern and Chris Taylor respond (both are from Science 2007).  In the final essay in this section, Gilbert Metcalf examines market-based policy instruments that can be used to address greenhouse gas emissions (Journal of Economic Perspectives 2009).

Sustainability, the Commons, and Globalization

Part IX begins with Robert Solow’s economic perspective on the concept of sustainability.  This is followed by Elinor Ostrom’s development of a general framework for analyzing sustainability (Science 2009), and my own historical view of economic analysis of problems associated with open-access resources (American Economic Review 2011).  Then, Jeffrey Frankel draws on diverse sources of empirical evidence to examine whether globalization is good or bad for the environment (Council on Foreign Relations 2004).

Economics and Environmental Policy Making

The final section of the book, Part X, departs from the normative concerns of much of the volume to examine some interesting and important questions of political economy.  It turns out that an economic perspective can provide useful insights into questions that might at first seem to be fundamentally political.

Nathaniel Keohane, Richard Revesz, and I utilize an economic framework to ask why our political system has produced the particular set of environmental policy instruments it has (Harvard Environmental Law Review 1998).  Myrick Freeman reflects on the benefits that U.S. environmental policies have brought about since the first Earth Day in 1970 (Journal of Economic Perspectives 2002).  Lastly, Robert Hahn addresses the question that many of the articles in this volume raise:  what impact has economics actually had on environmental policy (Journal of Environmental Economics and Management 2000)?

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What Happened (and Why): An Assessment of the Cancun Agreements

The international climate negotiations in Cancun, Mexico, have concluded, and despite the gloom-and-doom predictions that dominated the weeks and months leading up to Cancun, the Sixteenth Conference of the Parties (COP-16) of the United Nations Framework Convention on Climate Change (UNFCCC) must be judged a success.  It represents a set of modest steps forward.  Nothing more should be expected from this process.

As I said in my November 19th essay – Defining Success for Climate Negotiations in Cancun – the key challenge was to continue the process of constructing a sound foundation for meaningful, long-term global action (not necessarily some notion of immediate, highly-visible triumph).  This was accomplished in Cancun.

The Cancun Agreements – as the two key documents (“Outcome of the AWG-LCA” and “Outcome of the AWG-KP”) are called – do just what was needed, namely build on the structure of the Copenhagen Accord with a balanced package that takes meaningful steps toward implementing the key elements of the Accord.  The delegates in Cancun succeeded in writing and adopting an agreement that assembles pledges of greenhouse gas (GHG) cuts by all of the world’s major economies, launches a fund to help the most vulnerable countries, and avoids some political landmines that could have blown up the talks, namely decisions on the (highly uncertain) future of the Kyoto Protocol.

I begin by assessing the key elements of the Cancun Agreements.  Then I examine whether the incremental steps forward represented by the Agreements should really be characterized as a success.  And finally I ask why the negotiations in Cancun led to the outcome they did.

Assessing the Key Elements of the Cancun Agreements

First, the Cancun Agreements provide emission mitigation targets and actions (submitted under the Copenhagen Accord) for approximately 80 countries – including, importantly, all of the major economies. In this way, the Agreements codify pledges by the world’s largest emitters – including China, the United States, the European Union, India, and Brazil – to various targets and actions to reduce emissions by 2020.  The distinction between Annex I and non-Annex I countries is blurred even more in the Cancun Agreements than it was in the Copenhagen Accord – another step in the right direction!

Also, for the first time, countries agreed – under an official UN agreement – to keep temperature increases below a global average of 2 degrees Celsius.  It brings these aspirations, as well as the emission pledges of individual countries, into the formal UN process for the first time, essentially by adopting the Copenhagen Accord one year after it was “noted” at COP-15.  (There’s also an abundance of politically-correct and in some cases downright silly window dressing in the Cancun Agreements, including repetitive references to various interpretations of the UNFCCC’s principle of “common but differentiated responsibilities,” as well as some discussion of examining a 1.5 C target.)

However, despite even the 2 degree (450 ppm concentration) aspirational target, the Agreements are no more stringent that the collection of submissions made under last year’s Copenhagen Accord.  But, as Michael Levi (Council on Foreign Relations) has pointed out, the Cancun Agreement “should be applauded not because it solves everything, but because it chooses not to.” As my colleagues and I have repeatedly emphasized in our work within the Harvard Project on Climate Agreements, many of the most important initiatives for addressing climate change will occur outside of the United Nations process (despite the centrality of that process).

Second, the Agreements elaborate on the mechanisms for monitoring and verification that were laid out in last year’s Accord.  Importantly, these now include “international consultation and analysis” of developing country mitigation actions.  Countries will report their GHG inventories to an independent panel of experts, which will monitor and verify reports of emissions cuts and actions.

Third, the Agreements establish a so-called Green Climate Fund to deliver financing for mitigation and adaptation. Importantly, the Agreements name the World Bank as the interim trustee of the Fund, despite objections from many developing countries, and create an oversight board, half of which consists of donor nation representatives.  In addition, the Agreements establish a goal by developed countries to mobilize $100 billion annually by 2020 to support mitigation and adaptation in developing countries, a funding target which would include public and private resources (that is, carbon markets and private finance), bilateral and multilateral flows, as well as the Green Climate Fund.

Whether the resources ever grow to the size laid out in Copenhagen and Cancun will depend upon the individual actions of the wealthy nations of the world.  However, it’s interesting that the section in the Cancun Agreements on adaptation comes before the section on mitigation.  Things have come a long way since the days when economists were virtually alone in calling for attention to adaptation (along with mitigation).  I recall when economists were therefore accused of throwing in the towel, and not caring about the environment!

Fourth, the Agreements advance initiatives on tropical forest protection (or, in UN parlance, Reduced Deforestation and Forest Degradation, or REDD+), by taking the next steps toward establishing a program in which the wealthy countries can help prevent deforestation in poor countries, possibly working through market mechanisms (despite exhortations from Bolivia and other leftist and left-leaning countries to keep the reach of “global capitalism” out of the policy mix).

Fifth, the Cancun Agreements establish a structure to assess the needs and policies for the transfer to developing countries of technologies for clean energy and adaptation to climate change, and a – as yet undefined – Climate Technology Center and Network to construct a global network to match technology suppliers with technology needs.

In addition, the Agreements endorse an ongoing role for the Clean Development Mechanism (CDM) and other “market-based mechanisms;” indicate that carbon capture and storage (CCS) projects should be eligible for carbon credits in the CDM; and offer some special recognition of the situations of the Central and Eastern European countries (previously known in UN parlance as “parties undergoing transition to a market economy”) and Turkey, all of which are Annex I countries under the Kyoto Protocol, but decidedly poorer than the other members of that group of industrialized nations.

That’s the 32-page Cancun Agreements in a nutshell.  As a member of one of the leading national delegations said to me in Cancun a few hours after the talks had concluded, “It’s incremental progress, but progress nonetheless.”

Are Such Incremental Steps Really a Success?

Recall from my November 19th essay that the best goal for the Cancun climate talks was to make real progress on a sound foundation for meaningful, long-term global action.  I said that because of some fundamental scientific and economic realities, which I will not repeat here.  In that previous essay, I also described “What Would Constitute Real Progress in Cancun” A quick comparison of my criteria from November 19th and the Cancun Agreements of December 11th tells me that the outcome of Cancun should be judged a success.

My first criterion of success was that the UNFCCC should embrace the parallel processes that are carrying out multilateral discussions on climate change policy:  the Major Economies Forum or MEF (a multilateral venue for discussions – but not negotiations – among the most important emitting countries); the G20 (periodic meetings of the finance ministers – and sometimes heads of government – of the twenty largest economies in the world); and various other multilateral and bilateral organizations and discussions.  Although the previous leadership of the UNFCCC seemed to view the MEF, the G20, and most other non-UNFCCC forums as competition – indeed, as a threat, the UNFCCC’s new leadership under Executive Secretary Christiana Figueres displays a positive and pragmatic attitude toward these parallel processes.

My second criterion was that the three major negotiating tracks be consolidated.  These tracks were:  first, the UNFCCC’s KP track (negotiating national targets for a possible second commitment period – post-2012 – for the Kyoto Protocol); second, the LCA track (the UNFCCC’s negotiation track for Long-term Cooperative Action, that is, a future international agreement of undefined nature); and third, the Copenhagen Accord, negotiated and noted at COP-15 in Copenhagen, Denmark, in December, 2009.

Permit me, please, to quote from my November 19th essay:

Consolidating these three tracks into two tracks (or better yet, one track) would be another significant step forward.  One way this could happen would be for the LCA negotiations to take as their point of departure the existing Copenhagen Accord, which itself marked an important step forward by blurring for the first time (although not eliminating) the unproductive and utterly obsolete distinction in the Kyoto Protocol between Annex I and non-Annex I countries.  (Note that more than 50 non-Annex I countries now have greater per capita income than the poorest of the Annex I countries.)

This is precisely what has happened.  The Cancun Agreements – the product of the LCA-track negotiations – build directly, explicitly, and comprehensively on the Copenhagen Accord.  The two tracks have become one.

Alas, the KP track remains, and a decision on a potential second commitment period (post-2012) for the Kyoto Protocol has been punted to COP-17 in Durban, South Africa, in December, 2011.  It is difficult to picture a meaningful – or any – second commitment period for the Kyoto Protocol, with the United States out of that picture, and with Japan and Russia having stated unequivocally that they will not take up another set of targets, and with Australia and Canada also unlikely to participate.  But note that this issue will have to be confronted in Durban a year from now.  With the first commitment period of the Kyoto Protocol ending in 2012, COP-17 will provide the last opportunity for punting that contentious issue.

If you agree with my view – which I have written about in many previous blog posts – that the Kyoto Protocol is fundamentally flawed and that the Protocol’s dichotomous distinction between Annex I and non-Annex I countries is the heavy anchor that slows meaningful progress on international climate policy, then you will not consider it bad news that a second commitment period for the Protocol is looking less and less likely.  On the other hand, you will, in that case, share my disappointment that the issue has been punted (recognizing, however, that had it not been punted, the Cancun meetings could have collapsed amidst acrimony and recriminations).

I also wrote in my November 19th post:

The UNFCCC principle of “common but differentiated responsibilities” could be made meaningful through the dual principles that:  all countries recognize their historic emissions (read, the industrialized world); and all countries are responsible for their future emissions (think of those rapidly-growing emerging economies).

The Cancun Agreements do this by recognizing directly and explicitly these dual principles.  This can represent the next step in a movement beyond what has become the “QWERTY keyboard” (that is, unproductive path dependence) of international climate policy:  the distinction in the Kyoto Protocol between the small set of Annex I countries with quantitative targets, and the majority of countries in the world with no responsibilities.

A variety of policy architectures can build on these dual principles and make them operational, bridging the political divide which exists between the industrialized and the developing world.  (At the Harvard Project on Climate Agreements, we have developed a variety of architectural proposals that could make these dual principles operational.  See, for example:  “Global Climate Policy Architecture and Political Feasibility: Specific Formulas and Emission Targets to Attain 460 PPM CO2 Concentrations” by Valentina Bosetti and Jeffrey Frankel; and “Three Key Elements of Post-2012 International Climate Policy Architecture” by Sheila M. Olmstead and Robert N. Stavins.)

My third criterion for success was movement forward with specific, narrow agreements, such as on:  REDD+ (Reduced Deforestation and Forest Degradation, plus enhancement of forest carbon stocks); finance; and technology.  Such movement forward has, in fact, occurred in all three domains in the Cancun Agreements, as I described above.

My fourth criterion for success was keyed to whether the parties to the Cancun meetings could maintain sensible expectations and thereby develop effective plans.  This they have done.  The key question was not what Cancun accomplishes in the short-term, but whether it helps put the world in a better position five, ten, and twenty years from now in regard to an effective long-term path of action to address the threat of global climate change.

Despite the fact that some advocacy groups – and for that matter, some nations – are no doubt disappointed with the outcome of Cancun, I think it is fair to say that this final criterion for success was satisfied:  the Cancun Agreements can help put the world on a path toward an effective long-term plan of meaningful action.

Why Did Cancun Succeed?

If you agree with my assessment of success in Cancun, then a reasonable question to ask is why did the Cancun talks produce this successful outcome, particularly in contrast with what many people consider a less successful outcome of the Copenhagen talks last year.  To address this question, let me expand on some points made in an insightful essay by Elliot Diringer, Vice President for International Strategies at the Pew Center on Global Climate Change.

First, the Mexican government through careful and methodical planning over the past year prepared itself well, and displayed tremendous skill in presiding over the talks. Reflect, if you will, on the brilliant way in which Mexican Minister of Foreign Affairs, Patricia Espinosa, who served as President of COP-16, took note of the objections of Bolivia (and, at times, several other leftist and left-leaning Latin American countries, known collectively as the ALBA states), and then simply ruled that the support of 193 other countries meant that “consensus” had been achieved and the Cancun Agreements had been adopted by the Conference.  At a critical moment, Ms. Espinosa noted that “consensus does not mean unanimity,” and that was that!

Compare this with the unfortunate chairing of COP-15 in Copenhagen by Danish Prime Minister Lars Løkke Rasmussen, who allowed the objections by a similar same small set of five relatively unimportant countries (Bolivia, Cuba, Nicaragua, Sudan, and Venezuela) to derail those talks, which hence “noted,” but did not adopt the Copenhagen Accord in December, 2009.

The Mexicans were also adept at facilitating small groups of countries to meet to advance productive negotiations, but made sure that any countries could join those meetings if they wanted.  Hence, negotiations moved forward, but without the sense of exclusivity that alienated so many small (and some large) countries in Copenhagen.

The key role played by the Mexican leadership is consistent with the notion of Mexico as one of a small number of “bridging states,” which can play particularly important roles in this process because of their credibility in the two worlds that engage in divisive debates in the United Nations:  the developed world and the developing world.  We have examined this in our recent Harvard Project on Climate Agreements Issue Brief, Institutions for International Climate GovernanceMexico, along with Korea, are members of the OECD, but are also non-Annex I countries under the Kyoto Protocol.  This gives Mexico — and gave Minister Espinosa — a degree of credibility across the diverse constituencies in the UNFCCC that was simply not enjoyed by Danish Prime Minister Rasmussen at COP-15 last year.

Second, China and the United States set the tone for many other countries by dealing with each other with civility, if not always with understanding.  This contrasts with the tone that dominated in and after Copenhagen, when finger-pointing at Copenhagen between these two giants of the international stage led to a blame-game in the months after the Copenhagen talks.

As Elliot Diringer wrote, they may have recognized that “the best way to avoid blame was to avoid failure.”  Beyond this, although the credit must go to both countries, the change from last year in the conduct of the Chinese delegation was striking.  It appeared, as Coral Davenport wrote in The National Journal, that the Chinese were on a “charm offensive.”  Working in Cancun on behalf of the Harvard Project on Climate Agreements, I can personally vouch for the tremendous increase from previous years in the openness of members of the official Chinese delegation, as well as the many Chinese members of civil society who attended the Cancun meetings.

Third, a worry hovered over the Cancun meetings that an outcome perceived to be failure would lead to the demise of the UN process itself.  Since many nations (in particular, developing countries, which made up the vast majority of the 194 countries present in Cancun) very much want the United Nations and the UNFCCC to remain the core of international negotiations on climate change, that implicit threat provided a strong incentive for many countries to make sure that the Cancun talks did not “fail.”

Fourth, under the pragmatic leadership of UNFCCC Executive Secretary Christiana Figueres, realism may have finally eclipsed idealism in these international negotiations. Many observers have noted that many delegations – and probably most civil society NGO participants – at the previous COPs have misled themselves into thinking that ambitious cuts in greenhouse gases (GHGs) were forthcoming that could guarantee achievement of the 450 ppm/2 degrees C cap.

The acceptance of the Cancun Agreements suggests that the international diplomatic community may now recognize that incremental steps in the right direction are better than acrimonious debates over unachievable targets.  This harkens back to what I characterized prior to COP-16 as the key challenge facing the negotiators:  to continue the process of constructing a sound foundation for meaningful, long-term global action.  In my view, this was accomplished in Cancun.

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Further Reading

In a new blog post, Trevor Houser (Peterson Institute for International Economics) argues that the surest way to kill the progress made in the Cancun Agreements is to try to turn them into a legally-binding treaty at COP-17 next year in Durban, South Africa.

For a nice table showing the correspondence of respective elements of the Cancun Agreements and the Copenhagen Accord, see the commentary on the Cancun climate negotiations by Sarah Ladislaw of the Center for Strategic and International Studies.

And for a detailed description of the major elements of the Cancun Agreements, I recommend the summary prepared by the Pew Center on Global Climate Change.

Some previous essays I have written and posted at this blog may be of interest to those who are interested in the Cancun Agreements.  Here are links, in reverse chronological order:

Defining Success for Climate Negotiations in Cancun

Opportunities and Ironies: Climate Policy in Tokyo, Seoul, Brussels, and Washington

Another Copenhagen Outcome: Serious Questions About the Best Institutional Path Forward

What Hath Copenhagen Wrought? A Preliminary Assessment of the Copenhagen Accord

Chaos and Uncertainty in Copenhagen?

Only Private Sector Can Meet Finance Demands of Developing Countries

Defining Success for Climate Negotiations in Copenhagen

Approaching Copenhagen with a Portfolio of Domestic Commitments

Can Countries Cut Carbon Emissions Without Hurting Economic Growth?

Three Pillars of a New Climate Pact

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Unintended Consequences of Government Policies: The Depletion of America’s Wetlands

Private land-use decisions can be affected dramatically by public investments in highways, waterways, flood control, or other infrastructure.  The large movement of jobs from central cities to suburbs in the postwar United States and the ongoing destruction of Amazon rain forests have occurred with major public investment in supporting infrastructure.  As these examples suggest, private land-use decisions can generate major environmental and social externalities – or, in common language, unintended consequences.

In an analysis that appeared in 1990 in the American Economic Review, Adam Jaffe of Brandeis University and I demonstrated that the depletion of forested wetlands in the Mississippi Valley – an important environmental problem and a North American precursor to the loss of South American rain forests – was exacerbated by Federal water-project investments, despite explicit Federal policy to protect wetlands.

Wetland Losses

Forested wetlands are among the world’s most productive ecosystems, providing improved water quality, erosion control, floodwater storage, timber, wildlife habitat, and recreational opportunities.  Their depletion globally is a serious problem; and preservation and protection of wetlands have been major Federal environmental policy goals for forty years.

From the 1950s through the mid-1970s, over one-half million acres of U.S. wetlands were lost each year.  This rate slowed greatly in subsequent years, averaging approximately 60 thousand acres lost per year in the lower 48 states from 1986 through 1997.  And by 2006, the Bush administration’s Secretary of the Interior, Gale Norton, was able to announce a net gain in wetland acreage in the United Sates, due to restoration and creation activities surpassing wetland losses.

What Caused the Observed Losses?

What were the causes of the huge annual losses of wetlands in the earlier years?  That question and our analysis are as germane today as in 1990, because of lessons that have emerged about the unintended consequences of public investments.

The largest remaining wetland habitat in the continental United States is the bottomland hardwood forest of the Lower Mississippi Alluvial Plain.  Originally covering 26 million acres in seven states, this resource was reduced to about 12 million acres by 1937.  By 1990, another 7 million acres had been cleared, primarily for conversion to cropland.

The owner of a wetland parcel faces an economic decision involving revenues from the parcel in its natural state (primarily from timber), costs of conversion (the cost of clearing the land minus the resulting forestry windfall), and expected revenues from agriculture.  Agricultural revenues depend on prices, yields, and, significantly, the drainage and flooding frequency of the land.  Needless to say, landowners typically do not consider the positive environmental externalities generated by wetlands; thus conversion may occur more often than is socially optimal.

Such externalities are the motivation for Federal policy aimed at protecting wetlands, as embodied in the Clean Water Act.  Nevertheless, the Federal government engaged in major public investment activities, in the form of U.S. Army Corps of Engineers and U.S. Soil Conservation Service flood-control and drainage projects, which appeared to make agriculture more attractive and thereby encourage wetland depletion.  The significance of this effect had long been disputed by the agencies which construct and maintain these projects; they attributed the extensive conversion exclusively to rising agricultural prices.

In an econometric (statistical) analysis of data from Arkansas, Mississippi, and Louisiana, from 1935 to 1984, Jaffe and I sought to sort out the effects of Federal projects and other economic forces.  We discovered that these public investments were a very substantial factor causing conversion of wetlands to agriculture, with between 30 and 50 percent of the total wetland depletion over those five decades due to the Federal projects.

More broadly, four conclusions emerged from our analysis.  First, landowners had responded to economic incentives in their land-use decisions.  Second, construction of Federal flood-control and drainage projects caused a higher rate of conversion of forested wetlands to croplands than would have occurred in the absence of projects, leading to the depletion of an additional 1.25 million acres of wetlands.  Third, Federal projects had this impact because they made agriculture feasible on land where it had previously been infeasible, and because, on average, they improved the quality of feasible land.  Fourth, adjustment of land use to economic conditions was gradual.

Government Working at Cross-Purposes

The analysis highlighted a striking inconsistency in the Federal government’s approach to wetlands.  In articulated policies, laws, and regulations, the government recognized the positive externalities associated with some wetlands, with the George H.W. Bush administration first enunciating a “no net loss of wetlands” policy.  But public investments in wetlands – in the form of flood-control and drainage projects – had created major incentives to convert these areas to alternative uses.  The government had been working at cross-purposes.

The conclusion that major public infrastructure investments affect private land-use decisions (thereby often generating negative externalities) may not be a surprise to some readers, but it was the 1990 analysis described here that first provided rigorous evidence which contrasted sharply with the accepted wisdom among policy makers.

The Ongoing Importance of Induced Land-Use Changes

As wetlands, tropical rain forests, barrier islands, and other sensitive environmental areas become more scarce, their marginal social value rises.  In general, if induced land-use changes are not considered, the country will engage in more public investment programs whose net social benefits are negative.

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