My writings are grouped under the following topics (the entries follow below).

GLOBAL WARMING

AIR POLLUTION

ENVIRONMENTAL ECONOMICS

SCIENCE AND PUBLIC POLICY


NEW ITEMS

I have just released a formal version of my T3 Tax proposal as a working paper through SSRN.

 On June 26 I testified before the US House of Representatives Subcommittee on Energy and Air Quality. My spoken comments were only about 4 minutes (not as long as what's written here) but I made an extended submission.

I have an article in the April 2008 edition of Academic Matters critiquing the notion of an environmental crisis.

I have a chapter coming out in a book by the American Institute for Economic Research (AIER) in which I present some of my criticisms of the IPCC, by way of examples where they distorted or eliminated contrary evidence. The presentation took the form of a response to an invited talk by my friend David Henderson.

GLOBAL WARMING

I have written quite a bit on this, including a book, journal articles, think-tank reports and media op-eds. In general I’m trying to get out of the area, but as the saying goes, touch the devil and you can’t let go.

I am interested in the question of what future global CO2 emissions will be and how the IPCC forecasts them. I think the IPCC has exaggerated likely future emission trends. This conclusion is based on empirical work (coauthored with Mark Strazicich) which is undergoing the long, slow journal review process. The Fraser Forum article and the Post op-ed give the gist of the argument, but the article under review goes into a whole lot of econometric detail and provides a theoretical growth model to explain why the empirical results make sense, and why settling the related issue of “convergence” will be important for constraining future emission forecasts. I have a Ph.D. student working on this topic and some grant money to push it along

Global Warming – Hockey Stick

This topic occupied a great deal of my time from 2003—2006. For a crash course read

  • McKitrick, Ross R. (2005) What is the Hockey Stick Debate About? Presentation to the Asia Pacific Economic Cooperation Study Centre Meeting on "Managing Climate Change - Practicalities and Realities in a post-Kyoto Future", Parliament House, Canberra Australia, April 4, 2005 (by videolink).

which carries the story up to early 2005 when our papers in GRL and E&E had just come out. That was the end of the technical issues, but the process carried on in the form of the expert panel of the US National Academy of Sciences, and the Wegman Committee reports. We were asked to meet the NAS panel and make a presentation, whereas the Wegman Committee conducted its work without our input. I have summarized the outcomes in these op-eds:

A well-received essay explaining the early history of the episode, and its implications, is

A large library of related writings is at the

The most important scientific paper Steve and I put out was also, probably, the least read:

Nothing that appeared in print thereafter added anything of real importance to what was in that paper. Some of the subsequent papers, like Ammann and Wahl’s submission to Climate Change, just re-hashes trivial arguments that were already dealt with in that paper.

The key paper in terms of cracking open the professional debate was our GRL paper:

Two comments were submitted to GRL by Wahl/Ammann and Ritson, both of which were peer-reviewed and rejected (in part because they belabour points already resolved in our E&E paper). Two comments were also submitted by von Storch/Zorita and Huybers, and these were accepted (along with our replies). The von Storch/Zorita one is rather pointless, it merely presents a contrived case in which the PC distortion doesn’t matter. Our reply presented the reasons why their example was irrelevant to understanding the Mann data set, and along the way we present some pretty excruciating findings about how little temperature information is in the Mann data set. Huybers made a legitimate argument about how the RE score should be benchmarked, which prompted us to revise some calculations.

We also put out a little backgrounder to explain this exchange in more detail.

In winter 2005 we went to DC and spoke at the National Press Club about our work. The Marshall Institute hosted us and covered my travel costs.

The first paper we published, the one that got it all going, is still a rollicking good read.

I have included on my pubs list the Materials Complaint we sent in to Nature. Though not a standard journal article, it was reviewed and upheld by the editors of Nature.

There are other writings and links available at the M&M page, such as our NAS submissions.

Global Warming – Temperature Data

Temperature data around the world is collected for meteorological purposes. Climate data is something different, and has to be produced by a model, using temperature data as an input. The model is intended to “fix” known sources of contamination due to land use changes, inconsistent quality control etc. Yet the validity of the models used to produce climate data has been subject to little formal testing, and what testing has been done points to serious problems. My 2004 work with Pat Michaels showed that the “corrections” being commonly applied do not correct the contamination, and leave a strong warming bias in the global land record.

Since I publish my data and code along with the papers, these results were heavily scrutinized. A blogger found a small numerical error: I omitted to convert the latitude measure to radians (from degrees) prior to computing the cosine. This had only a trivial effect, but many climate scientists dismissed or ignored all the results largely on the basis of rumours that the results had been undermined. We published an Erratum right away, putting the before and after results side-by-side so people could see how small the changes were. The Erratum is posted at:

There was also a strange comment on our work submitted to Climate Research. It was not peer-reviewed, instead the Editor just told us to write a response and, after editing, he published it with the comment. The author found that if he discarded half the data he got weaker results. Well surprise surprise. Here’s our response.

After that paper was published we extended the study to a global sample, and I built a new socioeconomic data base, adding new covariates and going to a complete coverage of the available land surface. The new results fully confirm the old ones: the global land-based surface data set is heavily contaminated by extraneous ‘signals’ arising from land-surface modifications and variations in quality control. In a new paper we estimate the overall impact on measured warming over land and discuss the implications for understanding climate data. It’s high time for a much deeper re-examination of basic climate data sets.

A while ago I saw a fascinating essay by Joe D'Aleo on the sudden loss of measurement sites around 1990. I graphed it up and the graph has since been used by a number of other authors, including Marlo Lewis in his book 'A Skeptics Guide to Global Warming'. A detailed explanation of that graph and its origins is here:

In my ‘T3’ chapter (see T3 Tax section below) I discuss the laughable excuse recently provided by the IPCC for ignoring Pat Michaels’ and my work on the data contamination problem. My criticism of global temperature data does not end there. In Taken By Storm Chris Essex and I explained in informal terms why there’s no such thing as a “global temperature.” We spelled out the theoretical argument in this paper:

The implications are very important. The notion of a planet “warming” or “cooling” is ill-posed, at least in the context of the global warming discussion. Talking about a trend in a temperature average over a non-equilibrium system as if it is denotes “warming” (i.e. an increase in a number known to be a temperature) is scientific hand-waving and short cut-taking that conceals nontrivial physical problems. Every field (including economics) has to take short-cuts, but eventually when the discrepancies are piling up all around, someone has to go back and see where the wrong turn was. I figure people in the climate field will come looking for this paper in about 10 years.

This next article was invited by the late Kirill Kondratiev. I apply some basic econometrics to temperature data to show that inference about trends (i.e. deciding whether a trend is significant or not) requires some careful testing and estimation. This topic was also waved away by the IPCC (at issue was the work of some others who examined long term persistence in temperature records). I discuss that in the T3 chapter. It’s a worthwhile expository paper for people who want to see how to apply some time series methods to temperature data.

  • *McKitrick, Ross R. (2002). "Inference About Trends in Temperature Data After Controlling for Serial Correlation and Heteroskedastic Variance." Invited Paper, Proceedings of the Russian Geographical Society 164(3) pp. 16-24. (English version)

Global Warming – IPCC and the Fourth Assessment Report

Chris Essex and I talk at length about the IPCC and its deficiencies in our book Taken By Storm.

I also discussed specific criticisms of how the IPCC operates in the following presentations, one of which became a book chapter and the other appeared in the Canadian Journal of Agricultural Econonomics.

I was an expert reviewer for the recent AR4. I found a lot of the report was fine and indeed well-done. But there are, so to speak, two IPCC reports. One is the large number of chapters and sections that describe the climate topic in all its complexity: limitations of models, ambiguity of data, difficulty of explaining changes, uncertainty over basic ideas, etc. Little of that material makes it into the widely-read summaries. The other IPCC Report is the AR4 material on surface temperature data, paleoclimate reconstructions and “attribution”. These sections are heavily spun and the Summary for Policy Makers then draws primarily on them. It seemed to me last year, in advance of the release of the IPCC Report, that there was a need for an Independent Summary for Policy Makers. Fortunately I was able to find a high quality group of contributors to work on it, and the Fraser Institute agreed to publish it. Our ISPM was reviewed by 65 experts, and unlike the IPCC we tabulated their responses. I remain convinced that if both the IPCC SPM and our ISPM were assessed by all the members of, say, the American Meteorological Society, ours would be given higher marks. I still use it as a reference guide to the IPCC Report.

At the time of the release of the IPCC Summary, Newsweek contacted me for an interview. By the end of it, the editor I spoke to decided they could not really fit what I had to say into a story, and they invited me to write a column instead.

Recently I gave a talk at a conference sponsored by the American Institute for Economic Research, where I was a respondent to a presentation by David Henderson entitled "Governments and Climate Change Issues: the Flawed Consensus." In my remarks I discuss a series of examples drawn from my observations acting as an IPCC reviewer which, in my view, establish a disturbing pattern of bias on the part of the IPCC. I also explain how I think it should be fixed.

  • McKitrick, Ross R. (2007) "McKitrick.final.pdf" to be published in a forthcoming book by the AIER.

Global Warming – The T3 Tax

Overall I am very skeptical about the idea that global warming is a scientifically well-defined concept, that it is known to be driven by CO2emissions and will cause a dangerous crisis for the world. Consequently I think policies to reduce CO2emissions are likely to be a waste even if well-designed, and much moreso when they are ill-conceived. But I know a lot of people are worried about it, and I can’t blame them since the media tsunami on this topic in recent years all but forbids dissent, unless you are equipped with a lot of detailed counter-information or you just have a very good BS detector.

Recently I came up with a policy proposal that reconciles my skepticism with the policy activism of the alarmists: calibrate a carbon tax to the average temperature of the region of the atmosphere predicted by climatologists to be most sensitive to CO2. I call it the ‘T3’ tax, and I think the proposal should make everyone happy, except the most extreme alarmists and the Trojan horse-types who see the global warming issue as a vehicle for imposing a set of anti-growth policies that they would want even if global warming fizzles as a pretext. The Post op-ed explains the T3 concept briefly. It got a lot of attention on the internet (partly through a headline link on Arts and Letters Daily). The Vancouver Volumes chapter develops the idea in full technical detail. I also did a recent interview about the T3 Tax on the Australian radio show Counterpoint (ABC). The 4-page E&E edition is a forthcoming commentary in Environment and Energy. It provides a more detailed summary than the Post op-ed.

Global Warming – Economics/Policy

I was recently asked to talk about emission pricing at a conference organized by Queen’s University. This powerpoint deck gives a quick overview and introduced the T3 concept.

  • McKitrick, Ross R. (2007) Emission Pricing: Some Implementation Issues. Invited presentation to Queen’s University Institute of Energy and Environmental Policy conference “The Future of Coal in Ontario.” Toronto, May 10 2007.

The Ottawa Economics Association invited me to address the question of Canada’s options on global warming policy, on the eve of the new Conservative government’s announcement. In this paper I explain why pricing instruments are preferred to quantity targets, and what the literature says about the approximate marginal damages due to CO2 emissions.

During the debate over whether Canada should ratify Kyoto, Randy Wigle and I published (through the CD Howe Institute) a critical review of the federal government’s work on implementation costs. A little later I was asked to discuss the government’s plans as they were reflected (or not) in the 2003 budget, for a conference at Queen’s University.

  • McKitrick, Ross R. (April 2003) "Budget '03 and the Kyoto Process." In The 2003 Federal Budget: Conflicting Tensions edited by Charles Beach and Thomas Wilson, John Deutsch Institute, Queen's University. [no link – buy the book!]

I recently gave a talk at Wilfrid Laurier University's Viessmann European Research Centre, comparing US and European approaches to climate change. My point was that while they have outlined different objectives, the constraints are so tight that the outcomes are pretty much the same.

This little paper sets out an argument that if we are unable to tell, ex post, whether a given weather event was due to global warming or not, we are unlikely ever to be able to compute the marginal damages due to carbon dioxide emissions. As such, we are better off planning to compensate victims ex post rather than trying to mitigate damages ex ante. If I was smarter and less distracted I would develop it into a more formal revision to the Integrated Assessment Model approach, which assumes away all the uncertainty over attribution.

I wrote this paper for the Competitive Enterprise Institute (they paid me a thousand bucks) explaining why cap and trade and similar methods for controlling CO2 emissions are bad ideas. I will have a new report for CEI this year going into more detail in light of the proposals before the US Congress.

This paper came out of my PhD thesis work, using a computable general equilibrium model to show that revenue-neutral carbon taxes can achieve some emission reductions at no net macroeconomic cost. It wouldn’t get us to the Kyoto target, but I do believe that a low carbon tax of up to about $20 per tonne, if fully recycled into payroll and income tax cuts, would not harm the economy. Of course it wouldn’t reduce emissions much either.

Global Warming – Taken By Storm

This is da book. The revised edition came out in Canada in Fall 2007 and in the US in Spring 2008. Publication in the rest of the world will occur in late 2008. It’s the best book out there on the subject, in my view, combining some irreverent humour with a serious presentation of the science, economics and social dynamics of this issue. Ideas sketched out in TBS provide a guide to what is now playing out in the scientific literature, and will be for many years to come (I know I know -- arrogant of me to say. But just watch.)

Global Warming – General overviews

I have recently presented some variation on the following talk to a few, mostly student audiences.

This one is a few years old but still presents what is, I think, a sound critique of the general sequence of thinking underlying the present policy quagmire.

This one is very short but poses some questions I wish were asked more often.

Global Warming – Submissions and Responses to Government Inquiries

In September 2007 I was contacted by a politician outside of Canada who was preparing for cabinet-level decisions on global warming policy. I was asked to identify half a dozen of the main assumptions about global warming that, if wrong, would invalidate the usual conclusions. Of course the topic is so big I could easily have written a book in response. A tidied-up version of my actual reply is here. I do not know what effect, if any, it had on the individual's views.

I delivered the following to the Canadian Parliamentary Committee looking into Canada’s Kyoto commitment. It was not well-received.

On occasion I have been encouraged to put in a submission to ongoing inquiries. These two went to the Australian Parliament and the UK House of Lords. In each case the outcomes were actually pretty good, so maybe it was worth the effort.

This one, on the other hand, was a waste of my time. It was provided to the Stern Review, and while I think it was a good submission, the outcome was, well, the Stern Review.

The Stern Review came in for a lot of professional criticism, and I was coauthor of what I consider the best and most thorough of the lot.

AIR POLLUTION

Lately I have been working on conventional urban air quality topics, including explaining the link between economic growth and air pollution, and re-evaluating the evidence for a health impact.

Air Pollution – Economics

I am interested in how economic growth relates to urban air quality. This paper presents a VAR-based model for analyzing the question and provides some plausible answers to what caused the postwar decoupling of US growth and pollution.

My one foray into the political science of environmental policy argues that Canadians have not historically based their votes on environmental outcomes. Despite all the current hoopla about the environment being at the top of the polls, I still expect that it does not affect party preferences that are formed on other bases than environmental platforms.

The Fraser Institute is putting out a book on Canadian environmental policy. I wrote the chapter on air pollution, and I think it does a good job explaining the current situation and proposing how future developments should be focused. I was writing it while the federal Conservatives were floundering around with their Green Plan, whose eventual form I think was pretty inferior.

This little article uses some international comparisons to talk about general priority-setting in economic development policy.

This article explains how I’d deal with transportation-induced air pollution in cities.

These op-eds critique the recent federal air quality/health index and the proposed new regulatory initiative by the federal Conservatives.

Air Pollution – Ontario Coal Plants

Here in Ontario the government has adopted the regrettable idea of shutting down our thermal power plants. I have presented counter-arguments in a few places. The most comprehensive is:

A recent presentation, to a conference organized by the Queen’s Institute of Energy and the Environment, makes the case very briefly:

I also did a review of the Ontario Cost-Benefit Analysis for the Power Workers’ Union in 2004.

Air Pollution – Pollution and Health

I have been doing some work on the connection between air pollution and health (or lack thereof). I have a paper coauthored with Lise Tole and Gary Koop, which is under review. I also wrote about the topic in some of the above papers, such as the Fraser Institute study on Ontario’s coal plants. Also included here are a talk I did to AMPCO in 2004 and an op-ed from the National Post.

  • **Koop, Gary, Ross R. McKitrick and Lise Tole. (2007) “Does Air Pollution Cause Respiratory Illness? A New Look at Canadian Cities.” Submitted. [Link forthcoming]

ENVIRONMENTAL ECONOMICS


Theory of Policy Design

Economics has a great deal to say about how to design policies that minimize the costs of achieving public objectives, as well as what those objectives ought to be. My contributions include a look at how a nonlinear tax system can achieve the right outcome when the regulator lacks information on private costs, what the optimal entry/exit condition is for a polluting industry, and how to improve the efficiency of ratio or intensity standards. Contact me if you want a reprint of any of these.

  • ** McKitrick, Ross (2005). "Decentralizing a Regulatory Standard Expressed in Ratio or Intensity Form." Energy Journal 26(4) 1-9.
  • **McKitrick, Ross R. and Robert C. Collinge. (2002) "The Existence and Uniqueness of Optimal Pollution Policy in the Presence of Victim Defense Measures." Journal of Environmental Economics and Management 44, pp 106-122.
  • **McKitrick, Ross R. (2001) "The Design of Regulations Expressed as Ratios or Percentage Quotas." Journal of Regulatory Economics 19(3), pp. 295-305.
  • **McKitrick, Ross R. and Robert C. Collinge, (2000) "Linear Pigovian Taxes and the Optimal Size of a Polluting Industry" Canadian Journal of Economics 33(4) pp. 1106-1119.
  • **McKitrick, Ross R. (1999) "A Derivation of the Marginal Abatement Cost Function." Journal of Environmental Economics and Management May 1999, pp. 306-314.
  • **McKitrick, Ross R. (1999) "A Cournot Mechanism for Pollution Control under Asymmetric Information." Environmental and Resource Economics October 1999, pp. 353-363.
  • **McKitrick, Ross and Timothy Shufelt (2002) "Environmental Impacts of Enhanced Property Rights." Environment and Energy 13(3) pp. 367-382.

SCIENCE AND PUBLIC POLICY

Being an economist, but having also worked on physical science issues, my thoughts have occasionally turned to the institutions used to apply scientific information to policy formation.

Science and Public Policy - Use of science in public policy formation

As a result of the hockey stick episode I got interested in the issue of how and whether scientific information should be audited by users, in particular by a government considering a multi-billion dollar public policy decision based on findings in scientific research papers. Bruce McCullough and I have written a critique of the current lack of controls on this process, and we propose a formal due diligence mechanism to rectify it.

  • McKitrick, Ross R. and Bruce D. McCullough (2007) “The Case for Due Diligence when Empirical Research is Used in policy Formation.” CD Howe Institute Commentary Series. [Link forthcoming.]

The following two papers were also listed in other sections above. They set down my initial thinking on the subject of fixing the process by which scientific information is assembled for use in policy formation. Also see Taken By Storm Chapter 10.

In addition to everything here, I have published some book reviews, other op-eds etc. If you are sure I wrote it and it’s not here, you can email me.