Home > AGW, carbon pricing, Cato, climate change, Joe Romm, Manzi, Weitzman > More on Manzi/Cato on climate

More on Manzi/Cato on climate

A few days ago I concluded that Jim Manzi’s lead essay in Cato Unbound’s new climate issue exhibited rather weak “libertariarian sinews”.

Allow me to note a few additional remarks on Manzi`s arguments.

1.  It’s clear from Manzi’s essay that (i) he is actually quite concerned about the risks posed by anticipated climate change, even while he dismisses the “scare stories” and the “precautionary principle” and (ii) he believes that the risks warrant even greater investments by government in climate science and carbon sequestration/geo-engineering efforts. 

While I commend Manzi for addressing at close to face value the IPCC’s warnings (even while climate science does not provide a firm basis for precise temperature or climate change prognostications) and the advice offered by economists such as William Nordhaus and Martin Weitzman, it is puzzling that he does not see in climate change concerns the opportunity for a positive agenda of deregulation and tax reform that would liberate our economy and help to spur changes in capital investments.

2.  Manzi has underplayed both the possible degree of climate change under “business as usual”/non-aggressive policy scenarios and the absolute and relative magnitude of the concomitant risks and costs.

Manzi notes that the “current IPCC consensus forecast is that, under fairly reasonable assumptions for world population and economic growth, global temperatures will rise by about 3 °C by the year 2100.” Note that this implies a an AVERAGE global temperature increase of 5.4 °F, with even greater temperature increases in the US and elsewhere the further one gets away from the equator. The IPCC does not make “forecasts”, but has analyzed and released a number of projections based on various scenarios, most of which assume aggressive actions to deploy clean energy technologies.

As fellow contributor Joe Romm (undergrad and Ph.D. in physics at MIT, Senior Fellow at the Center for American Progress, where he writes and maintains the Climate Progress blog, and author of “Hell and High Water: Global Warming–the Solution and the Politics–and What We Should Do” ) argues, Manzi has seriously understated the risks of much higher temperatures by 2100 that the IPCC has noted.  Joe Romm notes that, in fact, the growth of actual global carbon emissions since 2000 has exceeded the IPCC’s most extreme A1F1 scenario, and argues that 

“the latest IPCC report finds that, absent a sharp reversal of BAU trends, we are headed toward atmospheric levels of carbon dioxide far exceeding 1,000 parts per million by 2100. IPCC’s “best estimate” for temperature increase is 5.5°C (10°F), which means that over much of the inland United States, temperatures would be about 15°F higher.” (emphasis in original)

Further, even using a very optimistic projection, Manzi has also seriously understated the impact and costs that the IPCC suggests may be felt in the US. Manzi, assuming that global temperatures rise “only” by 3 °C increase by 2100, refers to an IPCC summary that states that such a temperature increase would cause total estimated economic losses in the low end of a range of 1–5 percent of global GDP (and later uses an estimate of 3% of GDP). This ignores not only the much higher costs that will be faced if warming is even greater, but also ignores:

(1) that as global GDP is expected to substantially grow, the absolute magnitude of the annual GDP loss may be very large, indeed,

(2) that measures of “economic” losses include adaptation costs as a part of GDP but do not cover non-market damages, the risk of potential extreme weather, socially contingent effects, or the potential for longer-term catastrophic events and

(3) that the greatest negative effects of climate change are expected to be felt in developing countries that have a relatively insignificant share of GDP.

3.  Manzi notes that even with the low-ball assumptions, mainstream economists like Yale’s William Nordhaus have long argued on a standard cost-benefit analysis basis that the gains from implementing an escalating carbon tax would outweigh the costs (Nordhaus has for many years been at the low end of the benefits to be gained), but even so Manzi argues that “the real world of geostrategic competition and domestic politics” one leads him to greatly discount the basis for a policy the difficulties with implementing a carbon tax or similar policy.

But it looks like Manzi has put his thumb on the scale again. Manzi asserts that in order to have an effective GHG mitigation policy, we would have to agree to, and enforce, “for hundreds of years” a “global, harmonized tax on all significant uses of carbon and other greenhouse gases in any material form” that “would run directly contrary to the narrow self-interest of most people currently alive on the planet” and that “all the side deals that would be required to get this done would create enough economic drag to more than offset the benefit.” Manzi also points to the ineffectiveness of the Kyoto Protocol, the apparent unwillingness of developing nations to agree to GHG restrictions and the penchant for politicians for loading down climate change legislation with special deals as reasons to think that a globally-coordinated climate policy is not worth while.

But while these are serious concerns, it is relatively easy to counter that:

– the Kyoto Protocol is no failure, but that the Europeans have been waiting for the US to agree to similar action rather than blindly biting any bullet unilaterally;

– it is clear that China, India, Brazil and other developing countries are seriously concerned about climate change, but their initial participation is not needed for the developed nations to commence a meaningful mitigation deal, and there are trade and other levers (including a desire for cleaner energy technologies) to eventually bring them on boar;

– Manzi later acknowledges this in his own plan for an agreement among developed nations to invest in technology that can then be shared with developing ones;and

– effective climate policy can be initiated and implemented domestically without external coordination, such as power market deregulation, allowing immediate depreciation of capital investments, and replacement of income taxes with resource taxes.

Further, it’s clear that Manzi`s assertion that climate policies “run directly contrary to the narrow self-interest of most people currently alive on the planet” is simply an unfounded and unjustifiable conclusion.

All of mankind shares the atmosphere, as an open-access but indispensable commons. We are approaching the point that the costs and risks of inaction (or rather, the costs of continuing free use without responsibility for costs/risks shifted to others) merit the costs of shifting to a system of shared rules (and other investments) with respect to its management – the efforts in which people and firms of many nations are voluntarily engaging in this regard are themselves evidence that even narrow self-interest justifies coordination with our neighbors (even as gamesmanship remains).

4.  Manzi next, rightly, considers the “inherently unquantifiable possibility that our probability distribution itself is wrong,” so that “the case for a carbon tax or a cap-and-trade emissions rationing system is really that it would be a hedge against the risk that actual damages from warming would be much, much worse than current risk-adjusted projections indicate,” with the primary purpose of such a tax or rationing system being “not to encourage conservation per se, but rather to induce the development of new technologies that can de-link economic growth from damaging accumulations of atmospheric carbon dioxide”.

Oddly, though, Manzi simply concludes, with no analysis, that any carbon pricing program would be “insanely expensive” and yet even then “would very likely not be high enough to successfully incentivize the creation of the desired technologies.” One would like to know on what basis he concludes that markets do not respond to incremental changes in prices – so that the governments of developed nations ought to directly make certain climate change technology investments (or incentivize them via prizes, etc.)

5.  It is also odd that Manzi then turns immediately from the dismissal of a gradualist pricing approach to a focus on “rapid, aggressive emissions abatement” that would only be justified if “the outer edge of the probability distribution of our predictions for global-warming impacts is enormously conservative, and disaster looms if we don’t change our ways radically and this instant,” in which case Manzi agrees that “we really should start shutting down power plants and confiscating cars tomorrow morning.”

Manzi seems to be as alarmist as many enviros, and to have even less faith in the market than they do.

Manzi then briefly addresses – and conflates with the table-pounding of Al Gore and others – the more sophisticated argument (advanced by Harvard’s Marty Weitzman) that “the risk that actual damages from warming would be much, much worse than current risk-adjusted projections indicate” is quite large. Says Manzi, “any rationale for rapid emissions abatement that confronts the facts in evidence is really a more or less sophisticated restatement of the precautionary principle: the somewhat grandiosely named idea that the downside possibilities are so bad that we should pay almost any price to avoid almost any chance of their occurrence.” 

Manzi believes that worrying too much about climate change is “to get lost in the hothouse world of single-issue advocates, and become myopic about risk,” while ignoring “lots of other unquantifiable threats of at least comparable realism and severity”. Well, I beg to disagree. While we can certainly deal with more than one risk at a time, why is it that conservatives like throwing trillions at “defense” and can focus on bird flu, but need to write off climate change? Could it have anything to do with what industries are in favor with Republicans and the White House?

Climate change differs from the other risks Manzi raises in that it is a risk that our own activities generate (not an “external” threat) – and one that we can manage by focussing on who is generating risk and asking them to bear some of the cost. Like the others, though, action is in some ways a collective choice problem, but unlike blowing trillions unilaterally on “defense”, climate change is a risk that other developed nations have shown they are willing to co-invest in heading off.

So why is continuing to be the spoiler in our national self-interest? Manzi provides the answer with a strawman:

“The loss of economic and technological development that would be required to eliminate literally all theorized climate change risk would cripple our ability to deal with virtually every other foreseeable and unforeseeable risk.”

Those who are concerned about climate change have long concluded that we are already facing ongoing climate change, with further unavoidable change in the pipeline, so simply nobody is talking about “eliminate[ing] literally all theorized climate change risk”.

6.  Finally, Manzi trots out his own proposal, after against dismissing any carbon pricing policies (and ignoring all others, like deregulation) with un-established suppositions:

“IF there is a real, though unquantifiably small, possibility of catastrophic climate change, and IF we would ideally want some technological hedges as insurance against this unlikely scenario, and IF raising the price of carbon to induce private economic actors to develop the technologies would be an enormously more expensive means of accomplishing this than would be advisable, then what, if anything, should we do about the danger?”

Apparently, Manzi has introduced these suppositions to tone down the much firmer and more extensive proposals he has made and justified elsewhere:

“There is, however, massive uncertainty (rather than mere risk) in our ability to predict the impacts of AGW, and recognizing this reality should lead us to take at least two actions: (1) improve the science to better-specify these extreme risks, and (2) hedge this uncertainty by making “insurance-type” investments today that would provide protection if an extreme AGW scenario ends up happening.”

Manzi`s proposals? To avoid the “failed game of industrial policy” by creating a climate change DARPA with a “a very high-IQ staff” to make many small (but collectively substantial) investments related to “detecting or ameliorating the effects of global warming” that “serve a public rather than a private need” (viz., that provide “no obvious potential source of profit to investors if successful”). Manzi thinks investments of the following types are merited: “improved global climate prediction capability, visionary biotechnology to capture and recycle carbon dioxide emissions, or geo-engineering projects to change the albedo of the earth’s surface or atmosphere”. Does Manzi not see that carbon pricing, if structured to allow offsets, would encourage private investments in all of these areas?

Ironically, Manzi concludes that “attempt[ing] to use the government to control the evolution of the energy sector of the economy” is not a “prudent reaction” to risk, but “the opposite: an impractical, panicky reaction unworthy of a serious government”.

Well, Jim, nice try, and thanks for your impractical, imprudent and panicky reaction.

  1. TokyoTom
    August 27th, 2008 at 04:24 | #1

    crf, thanks for your comments. The point of carbon pricing is to incentivize reductions in GHG emissions while leaving to the market decisions about how to achieve reductions and what technologies to invest in.

    There ar fewer incentives for narkets to invest in prediction, sequestration and geo-engineering, but they still exist.

    Considerable public funds have been invested in climate models; if the government ceased funding model research and scenario generation, it would be likely that private investors would acquire one or more such models – which would help to deflate the politicization of the models.

    Further, if tax policy allows offsets for direct carbon capture or sequestration that are demonstrated to be effective (for at least a period of 50 years or so), then markets will also have incentives to invest in such technologies.

    Perhaps the strongest case for government funds is in investigating geo-engineering options, since it is difficult to see how private investors could capture any returns from such investments.

  2. crf
    August 26th, 2008 at 23:07 | #2

    Tokyo Tom wrote:

    Manzi thinks investments of the following types are merited: “improved global climate prediction capability, visionary biotechnology to capture and recycle carbon dioxide emissions, or geo-engineering projects to change the albedo of the earth’s surface or atmosphere”. Does Manzi not see that carbon pricing would encourage private investments in all of these areas?

    -|-|-

    Or you might say that carbon taxes, or the equivalent, would allow the market to fund what it decides are the better ideas for reducing emissions. With a tax, there is much less need for the government, within reason, to pick which technologies to fund, or allow to operate. I say “within reason”, because some technologies, like some carbon sequestration plans, can reduce carbon dioxide in the atmosphere, but we may not know whether they will still work after hundreds of years have passed. Other technologies, such as clean energy or energy efficiency, presently have better understood or lower risks of failure or avoid producing carbon dioxide in the first place: a carbon tax would make these technologies more valuable.

  3. TokyoTom
    August 26th, 2008 at 03:41 | #3
  4. liberty student
    August 26th, 2008 at 02:51 | #4
  1. No trackbacks yet.