Note added April, 2017: A more current and in-depth treatment of the price-elasticity of U.S. gasoline usage may be found in our Sept 2015 blog post, What an Energy-Efficiency Hero Gets Wrong about Carbon Taxes. — editor.

With gas at $3.50 a gallon in April, the U.S. mainstream media is replete with stories of drivers abandoning SUV’s, hopping on mass transit, and otherwise cutting back on gasoline. Yet a year or two ago, when pump prices were approaching and even passing the $3.00 “barrier,” the media mantra was that demand for gasoline was so inelastic that high prices were barely making a dent in usage.

Which story is correct? We lean toward the more “elastic” view, and here we’d like to share some of the data that inform our belief.

I’ve been tracking official monthly data on U.S. gasoline consumption for the past five years, and compiling the numbers in this spreadsheet. You’ll find that it parses the data in several different ways: year-on-year monthly comparisons (say, March 2008 vs. March 2007); three-month moving averages that smooth out most of the random variations in reporting; and full-year comparisons that allow a bird’s-eye view.

Here’s what we see in the data:

1. Gasoline demand is trending downward, though only slightly. In the 49 year-on-year comparisons, monthly gasoline use dipped below the year-earlier level only eight times, but these include each of the last five months (see Moving Avgs worksheet in the cited spreadsheet).
2. Gasoline’s short-run price-elasticity is rising. After a low of -0.04 in 2004, the short-run price-elasticity increased to -0.08 in 2005, -0.12 in 2006 and -0.16 in 2007. (I assume an “income-elasticity” of two-thirds in calculating price-elasticity; again, see Full Years worksheet.)
3. A big reason that gasoline use kept rising until recently was the growing economy. Demand is heavily affected by economic activity. The minimum year-on-year GDP growth for any month in all four years was plus 1.7% (see Moving Avgs worksheet).
4. Another reason gasoline demand was slow to drop is that the price signal, while significant, was less than advertised. Adjusted for general inflation, the average 2007 pump price was only 54% higher than the 2003 price. Amid all the talk of a doubling or even tripling in gas prices, it’s sobering to learn that you have to go all the way back to 1998 to find the last year that the real price was just half the 2007 price.
5. The biggest market barrier of all may have been gasoline price volatility. The spreadsheet spans 63 months, allowing 62 month-to-month comparisons. In 29 of these, the price went down (see 1-yr comparison worksheet). That’s right: the average gasoline price was less than the prior month’s an astounding 47 percent of the time (see graph). Pump prices have been so volatile that consumers didn’t know whether the price three months later would be up or down. The result? American families and automakers alike found it hard to justify long-term investments in more-efficient cars. And allied policies like de-subsidizing sprawl didn’t get taken seriously.
6. Nevertheless, gas prices have now risen five years in a row and are virtually certain this year to chalk up a sixth. There hasn’t been a comparable period of sustained increases since the late 1970s.

The big takeaway for carbon taxes is that the short-run price-elasticity of gasoline demand is rising (Point #2). (The long-run price-elasticity is probably around minus 0.4, as we discuss here.) While a rising elasticity contradicts the standard economic model in which price-sensitivities don’t change much over time, Point #5 provides a reasonable explanation: gasoline prices (and energy prices in general) had fluctuated so wildly for decades, and a sense of entitlement to cheap gasoline had become so ingrained in American society, that it took a long time for households and businesses to internalize the rise in pump prices — to regard it as real.

Perhaps now, however, a line has been crossed. Maybe the trigger was the price of crude breaching $100 a barrel, or the unspooling credit crisis signaling a fundamental change in the U.S. economy. Or it may simply have been the accumulating weight of price increases noted in Point #6. Whatever the reason(s), Americans seem, finally, to be getting the message that higher gas prices are here to stay.

That’s good news for the climate, national security, and green jobs. But bitter medicine for hard-pressed families as well as business and jobs that aren’t oil-intensive but are being pulled under by gasoline-caused belt-tightening. Imagine if the price rises had been delivered not by a rapacious market but via socially determined ramped-up increases in the gasoline tax (as some commentators have proposed since the 1970s, including, with renewed urgency, after 9/11).

Americans would have had time to adapt, along with real choices such as truly fuel-efficient cars and smaller houses in more-compact developments. And the extra revenues from the higher-priced gasoline would have belonged to all of us rather than just the owners of oil reserves. Those revenues could have been returned to households and businesses via tax-shifts or dividends, and not skimmed off for private enrichment.

The analogy to a revenue-neutral carbon tax couldn’t be more clear.

Car and Driver: Plummeting Auto Sales Show Value Of Putting A Price On carbon (Wash. Post editorial)

Carbon taxes having been getting much more attention in the Canadian press than they have in the United States. And familiarity with the concept of a carbon tax appears to produce support.

A Canadian Press Harris/Decima poll released last week revealed strong support for "a carbon tax levied on people and businesses based on the carbon emissions they generate," with 61% supporting such a tax and 32% opposed.

The poll showed even greater support for "an environmental tax refund paid to those who succeed in reducing their use of fossil fuels, electricity, water and the amount of garbage they produce," with 80% support and only 16% opposition.

According to Harris/Decima President Bruce Anderson, the basic concept of a carbon tax becomes more popular:

when the focus is on the broader aspects of our environmental footprint, not just carbon, when it is clear that the money raised would be used to incent environmental improvement, when the idea is that those who are taxed are those who aren’t trying, and when there is a signal that environmentally thoughtful behaviour will be rewarded." (Emphasis added.)

Rewarding the "thoughtful behavior" may explain the greater support offered for the "environmental tax refund" compared to the "carbon tax" poll question. Anderson concludes:

The central concept, of taxing particularly harmful behavior, and rewarding the opposite, is a potential political winner for the party that can get it right and describe it clearly. The tag "carbon tax" and the term "revenue neutral", from a political communications standpoint, are not ideal starting points, as communications go.

We agree with Anderson’s conclusion that "taxing particularly harmful behavior, and rewarding the opposite" — precisely what a revenue-neutral carbon tax is designed to do — is a potential political winner.

We intend to give more thought to his political communications point and whether there is a better way to frame the case for a revenue-neutral carbon tax. Ideas?

Photo: Flickr / champy1013

UPDATE – May 11 – The Canadian Press reported today on unsubstantiated rumors that the Liberal Party’s pollster has found far less favorable views about carbon tax when respondents were given details of British Columbia’s carbon tax plan. According to the rumors, "the poll found 30 per cent strongly opposed to the idea and 12 per cent somewhat opposed, compared to 23 per cent strongly supportive and 25 per cent somewhat supportive." Based upon Anderson’s conclusion above and assuming the rumored poll results are accurate, the Liberal Party pollster’s results might have been more favorable had he avoided use of the terms "carbon tax" and "revenue-neutral."

Canadian Liberal Party chief touts carbon tax on fuels, billions in tax cuts (Globe & Mail)

Frustrated Owners Try to Unload Gas Guzzlers (Boston Globe)

Clinton Pandering Didn’t Sucker Voters (Sacramento Bee columnist)

Press contacts:
Daniel Rosenblum, Co-Director • 914-837-3956 • dan@carbontax.org
Charles Komanoff, Co-Director • 212-260-5237 • kea@igc.org

NEW YORK (May 7, 2008)

Voters yesterday rejected Senator Hillary Clinton’s proposed gas tax “holiday” and, with it, the idea that energy taxes are political poison. The resounding victory in North Carolina and unexpectedly strong showing in Indiana by Senator Barack Obama, the only presidential candidate to oppose the Clinton-McCain tax holiday, could open the door to consideration of a revenue-neutral carbon tax.

While not every election serves as a referendum on a particular policy issue, yesterday’s clearly did. The proposal to suspend the federal gasoline tax this summer was the major policy issue distinguishing Senator Clinton from Senator Obama between the April 22 Pennsylvania primary and today. The issue received extensive media coverage due to both senators’ focus on it amid widespread concern over gasoline prices. [Update – As the New York Times noted this morning, "In both states, the candidates’ final arguments centered on a summertime suspension of the federal gasoline tax, which Mrs. Clinton proposed as an economic lift for voters and Mr. Obama derided as a political gimmick."] In rebuffing Senator Clinton’s quick and simplistic fix, voters demonstrated that they will consent to a tax when it advances important economic, environmental and national security priorities.

“Voters sent a powerful message yesterday that they are not willing to sacrifice the environmental and economic benefits of the gasoline tax for trivial, short-term benefits,” said Daniel Rosenblum, co-director of the Carbon Tax Center. “Voters in Indiana and North Carolina have driven a spike through the conventional wisdom that supporting a tax is political suicide. The path is cleared for consideration of a revenue-neutral carbon tax-and-dividend approach that cost-effectively reduces greenhouse gas emissions, strengthens the economy, reduces America’s dangerous dependence on foreign oil and returns the tax proceeds to all Americans through monthly dividends,” Rosenblum said.

“These past few weeks, Sen. Obama has stood up for energy prices that tell the truth about climate damage and national insecurity,” said Charles Komanoff, co-director of the Carbon Tax Center. “The voters have rewarded Obama’s political courage and sent a clear signal to Washington that they support price incentives to conserve oil and curb carbon emissions,” Komanoff added.

As Senator Obama stated in his North Carolina victory speech last night, “the American people are not looking for more spin. They’re looking for honest answers to the challenges we face.” An honest answer to the climate change challenge includes truth in energy pricing.

The Carbon Tax Center is a non-profit educational organization launched in 2007 to give voice to Americans who believe that taxing emissions of carbon dioxide — the primary greenhouse gas — is imperative to reduce global warming. Co-founders Charles Komanoff and Daniel Rosenblum bring to CTC a combined six decades of experience in economics, law, public policy and social change.

Americans Grow Up: We Reject Gas Tax Holiday (Grist)

Thanks to the gas tax “holiday” proposed by Senators McCain and Clinton, gasoline taxes (a component of carbon taxes) have become a major issue in the presidential campaign. Senators McCain and Clinton have been attacked across the political spectrum for pandering. Politicians from President Bush to House Speaker Pelosi have rejected the idea, as have newspaper editorial boards from the New York Times to the Wall Street Journal.

New York City Mayor Michael Bloomberg, a powerful carbon tax advocate, may have been the most succinct, calling a temporary suspension of the federal gasoline tax “about the dumbest thing I’ve heard in an awful long time from an economic point of view” and saying he did not see “any merit to it whatsoever” (NY Times, May 2). Economists have been nearly unanimous, with over 100 economists, including three Nobel Prize winners, signing a statement opposing the gas tax holiday.

In our last newsletter we acknowledged that “the ‘T’ word is unpopular with politicians,” but asserted that “awareness is growing that ‘putting a price on carbon’ is an essential element of any successful strategy to significantly reduce greenhouse gas emissions.” In fact, awareness is growing faster than we expected. We’re heartened by the widespread recognition that the gas tax holiday proposal is fundamentally flawed because it undercuts the need to properly price gasoline and would encourage gas use just when it is essential to discourage consumption. In breaking news, the Monday (May 5) New York Times will report that by 49% to 45%, more Americans think that lifting the gas tax is a bad idea than approve of the plan.

In addition, we are intrigued by a Wall Street Journal report that some members of Congress are advocating that proceeds of a windfall profits tax be used to provide rebates for consumers. It sounds a lot like the rebate we have proposed to return carbon tax revenues to the American people. While we take no position at this time on the merits of a windfall profits tax, it’s good to see thought being given to returning the windfall profit tax proceeds. It’s a step toward a revenue-neutral carbon tax.

Our next challenge is to convert the well-reasoned opposition to a gas tax holiday into support for a carbon tax. As a first step, we have begun preliminary planning for a Carbon Tax Conference to be held in Washington, D.C. in mid-November. The conference will be designed to focus public attention on a carbon tax as the best policy for reducing U.S. greenhouse gas emissions and is timed to occur just as a new administration and Congress begin establishing priorities and mapping out strategies. Interested in being involved in the early planning? If so, please let us know.

Please check our web page regularly for the latest developments on carbon tax issues and progress. We add important news stories to the “Headlines” column on our home page almost every day. Take a look at the excellent guest post by James Handley, an extraordinary volunteer at CTC, addressing the gas tax holiday issue. It was on our web page until today (in case you haven’t noticed, previous blog posts are listed just below the current post). Our next post will take up a related issue, the impact on demand of rising gasoline prices. There is more and more evidence that higher prices, such as would result from a carbon tax, lead to reduced consumption. That’s the premise of our proposed carbon tax and it’s being validated every day.

Finally, CTC does have to admit to one major failing. We’ve been so focused on policy issues and getting the message out that we haven’t spent the necessary time on fundraising. The result is predictable. We’re desperately short of money just when we need it the most. To continue playing our essential role, we need your financial help.

You can contribute to CTC in three ways, two of which are tax-deductible:

* Tax-deductible:

Write a check or money order to ELPC (Environmental Law & Policy Center), writing Carbon Tax Center in the memo line; mail it to ELPC at 35 East Wacker Drive, Suite 1300, Chicago, IL 60601. ELPC is CTC’s fiscal sponsor.

* Tax-deductible:

Make an on-line contribution via Groundspring by clicking on the DONATE NOW box on our website, www.carbontax.org.

* Not deductible:

Write a check or money order to Carbon Tax Center and send it to our New York City mailing address: CTC, 636 Broadway, Room 602, New York, NY 10012.

Please be as generous as you can, and please donate today. Thank you.

Sincerely,

Charles Komanoff
Dan Rosenblum

Guest Post by James Handley

Will you sell your vote for $25? Presidential candidates John McCain and Hillary Clinton are betting you will. They’re campaigning for a “holiday” on federal gasoline taxes for the summer months.

Of the three presidential contenders, only Barack Obama has demurred. Obama said last week:

[T]he federal gas tax is about 5 percent of your gas bill. If it lasts for three months, you’re going to save about $25 or $30, or a half a tank of gas.

Obama insists that the only permanent solution to rising gasoline and diesel fuel prices is to reduce consumption and increase use of alternative fuels.

Haven’t we been down this road before? Yes, a dozen years ago. The New York Times excoriated the same “gas tax holiday” in May 1996:

Fill ‘er up, America, this is the Memorial Day holiday and the start of the “summer driving season.” We are a road-running, gas-guzzling people and Bob Dole, Newt Gingrich and Bill Clinton all say our Federal tax should be lowered 4.3 cents a gallon. But the tax relief, if it ever comes, will be trivial — and will have a negative impact on public policy. It is, in short, something of a political fraud.

Low prices and higher demand by consumers, many of them all too willing to pay any price to drive at and over higher state speed limits, will only increase American dependency on foreign oil. If people are worried about energy, not to mention the environment and the budget deficit, suspending the 1993 gasoline tax increase (many politicians would make it permanent next year) is exactly the wrong way to go.

Now the specter of catastrophic global warming is snapping into sharp focus like a jack-knifed tractor trailer blocking all lanes as we careen along at 75 mph. Sirens are wailing and lights are flashing thanks in large part to the Nobel-winning work of the Intergovernmental Panel on Climate Change and Dr. James Hansen’s NASA-Goddard Climate team, un-muzzled despite Bush Administration threats.

And yet, U.S. energy policy is still “pedal to the metal” on the global warming accelerator — with McCain and Clinton urging us to “step on it” with a gas tax break. The exact opposite of what economists say is the essential step: pricing carbon emissions.

Yale economics professor William Nordhaus offers this litmus test:

[W]hether someone is serious about tackling… global warming can readily be gauged by… what they say about the carbon price. Suppose you hear a public figure who speaks eloquently of the perils of global warming… propose regulating the fuel efficiency of cars, or requiring high efficiency light bulbs or subsidizing ethanol, or providing research for solar power — but nowhere mentions the need to raise the price of carbon.

You should conclude that the proposal is not really serious and does not recognize the central economic message about how to slow climate change. To a first approximation, raising the price of carbon is a necessary and sufficient step for tackling global warming. The rest is largely fluff.

By declining to dangle the $25 bribe before the electorate, Sen. Obama has avoided the fluff. But he hasn’t yet taken the pro-active step of using prices to put the U.S. economy on a low-carbon diet.

Nordhaus provides the intellectual model, explaining that taxes on “bads” such as pollution and waste make our economy more productive and efficient and should therefore be viewed as the opposite of taxes on “goods” like products, income and employment.

Seven-Up soft drink was advertised in the ‘70s as the “Un-Cola.” Perhaps it’s time to market a carbon tax as the “un-tax.”

Photo: Flickr / pbo31