June 25, 2010
Posted by Frank Ackerman under Cantwell-Collins
| Tags: climate change
, energy independence
, oil spill
Is the Gulf of Mexico disaster a reason to pass climate legislation – or is that legislation largely irrelevant to curbing our oil use? A Greenwire article Tuesday quoted a number of economists arguing that the leading proposals in Congress wouldn’t do much to change our dependence on petroleum.
The only reasonable response is “yes, of course.” Climate proposals such as Kerry-Lieberman, Cantwell-Collins, or Waxman-Markey will have limited effects on oil consumption for two reasons: first, they are market mechanisms; second, they are weak market mechanisms.
To start with the good news, reducing carbon emissions from electric utilities is cheaper than reducing oil use. Any market mechanism is supposed to prompt us to do the cheapest things first; that’s the whole point. There are many ways to make electricity with lower carbon emissions than a coal plant; putting a price on carbon makes those alternatives cheaper relative to coal. There are also many ways to promote energy efficiency, incrementally reducing electricity use.
For most Americans, on the other hand, there is only one way to make transportation, and it runs on oil. In the short run, with all of us driving the cars we now own, there is very little chance to change our gasoline use. In the closing words of one of the best satirical videos about the oil spill, “BP: You’re not mad enough to not drive your car.” (more…)
May 5, 2010
Posted by Climate Economics Group under climate change
Our team at SEI-U.S., led by Frank Ackerman, has just released a new model for climate change, mitigation investment, and development that highlights a major dilemma for industrialized countries. The model, Climate and Regional Economics of Development (CRED), is designed to analyze the economic consequences of various climate and development choices, based on what we know about different regions’ current economies and their vulnerability to climate change.
What the model shows is that the most cost-effective way to reduce global emissions and maximize the yield of “green” investment is to target developing countries: Because the impact of every dollar is bigger in a lower-income economy, shifting capital from rich to poor regions has the best payoff.
Developing nations have advocated this approach for years, but industrialized nations have resisted, not wanting climate mitigation to become a vehicle for the redistribution of wealth. In fact, widely used economic models specifically correct for this “problem,” and focus on climate solutions that leave global inequality untouched by design.
Read our working paper to learn more.
April 9, 2010
Paul Krugman’s excellent article in the New York Times Magazine this weekend contrasts a slow, incremental approach to greenhouse gas mitigation (such as William Nordhaus’ “climate-policy ramp”) to more rapid measures better fitting the urgency suggested by the climate science literature. Krugman dubs the latter the “climate-policy big bang.”
Krugman has done a nice job of describing some of the major points of disagreement within the field of climate economics. Here’s his view:
[T]he policy-ramp prescriptions seem far too much like conducting a very risky experiment with the whole planet. Nordhaus’s preferred policy, for example, would stabilize the concentration of carbon dioxide in the atmosphere at a level about twice its preindustrial average. In his model, this would have only modest effects on global welfare; but how confident can we be of that? How sure are we that this kind of change in the environment would not lead to catastrophe? Not sure enough, I’d say, particularly because, as noted above, climate modelers have sharply raised their estimates of future warming in just the last couple of years.
Krugman concludes that the “nonnegligible probability of utter disaster” should guide our climate policy, and that this “argues for aggressive moves to curb emissions, soon.”
Anyone who has been reading this blog will know already that I feel that the evidence of both the climate science and climate economics literatures overwhelmingly supports a big-bang climate-policy approach. It’s nice to know that Paul Krugman is a supporter of these views, and it’s even nicer to have his clear and influential thoughts on this reach such a wide audience.
April 7, 2010
Why would the Obama administration allow new drilling in U.S. coastal areas, and what will it mean for greenhouse gas reductions? My colleague Frank Ackerman has a posting on the TripleCrisis blog today on off-shore drilling, peak oil, and how they relate to a carbon tax:
Solving our energy problems, without a change in direction, will lead to increasingly costly and environmentally destructive production – either deep offshore, or deep in the rocks below existing communities and watersheds. We need a tax (or a fee resulting from an allowance system) on energy, to keep the cost to consumers high enough to encourage conservation, while holding the price for producers low enough to discourage the pursuit of the worst fossil fuel deposits.
This is another way in which the distributional consequences of carbon permit giveaways (i.e., who gets the revenue – see Alejandro Reuss’ Public Goods posting from earlier this week) differ from those of permit auctions. A cap and trade system will increase the price of oil exploration only if businesses have to pay for their permits; if permits are given to the largest polluters for free, there will be no incentive to limit fossil fuel extraction from areas where underground reserves are not very rich and the environmental consequences of extraction are enormous.
April 5, 2010
Most economic analyses of “cap-and-trade” policies – under which the government sets a target amount of emissions and then issues tradable permits totaling that amount – take it for granted that it would not make any difference, in the reduction of emissions, if the government were to sell the permits or give them away. A 2008 report on cap-and-trade climate policies from the MIT Center for Energy and Environmental Policy Research puts it like this: “Economic theory suggests that the method of distributing emission allowances, i.e., through grandfathering or auctioning, will not affect an individual source’s output decisions or emissions.”
If firms always make optimal decisions, maximizing their profits, as mainstream “neoclassical” economists assume they do, this conclusion should be correct. It shouldn’t make any difference to a profit-maximizing firm whether, by reducing its emissions, it avoids the cost of buying emissions permits or reaps the benefit of selling permits. Either way, it will reduce emissions as long as the cost of doing so is less than the price of the permit.
But are real-life firms really the perfectly rational profit maximizers of the neoclassical economists’ imagination? Some insights from behavioral economics suggest they may not be, and therefore that they may react differently to a policy that makes them buy emissions permits compared to one that gives them permits for free.