Based on an analysis of a rural household survey data in Hubei province in 2004, we explore patterns of residential fuel use within the conceptual framework of fuel switching using statistical approaches.

Cross sectional data show that the transition from biomass to modern commercial sources is still at an early stage, incomes may have to rise substantially in order for absolute biomass use to fall, and residential fuel use varies tremendously across geographic regions due to disparities in availability of different energy sources. Regression analysis using logistic and tobit models suggest that income, fuel prices, demographic characteristics, and topography have significant effects on fuel switching. Moreover, while switching is occurring, the commercial energy source which appears to be the principal substitute for biomass in rural households is coal. Given that burning coal in the household is a major contributor to general air pollution in China and to negative health outcomes due to indoor air pollution, further transition to modern and clean fuels such as biogas, LPG, natural gas and electricity is important. Further income growth induced by New Countryside Construction and improvement of modern and clean energy accessibility will play a critical role in the switching process.

Google's initiative RE < C seeks to develop sources of renewable energy that are cheaper than coal-fired power. David G. Victor speaks to an audience at Google's Mountain View, CA headquarters about the current status and future prospects for coal -- the right hand side of Google's equation. 

Conventional wisdom holds that the OPEC oil cartel has the world in its grasp. It can manipulate prices by tinkering with supplies. Last month OPEC released a new study on world oil demand that seemed to signal the cartel was readying to tighten the taps because higher prices were slaking the world's thirst for oil. The American Petroleum Institute released fresh data showing that demand for oil products in the United States (the world's largest market) dropped a whopping 3 percent from the year earlier. The news about lower demand has caused oil prices to fall a bit, and all eyes are on OPEC's wizards to tighten supplies.

But the conventional wisdom is mostly wrong. OPEC (which stands for the Organization of the Petroleum Exporting Countries) is no wizard. For the most part, its actions lag behind fundamental changes in oil supply and demand rather than lead them. OPEC looks like a masterful cartel when, in fact, it is mainly just riding the waves.

It is hard to figure out exactly what goes on behind's OPEC's closed doors, but glimpses are possible by probing what the cartel members say about prices and how they set quotas. Over the last five years, OPEC members have announced ever-higher price goals only after the market had already delivered those high prices. As the market has soared, OPEC has followed. Only in the last few months has Saudi Arabia suggested that the cartel would be better off if prices reversed because high prices would encourage the world's big oil consumers to wean themselves from oil. It proffered $125 a barrel. The markets shrugged and kept on rising until real facts about slowing demand revealed that fundamentals were changing.

OPEC also sets quotas so that each member knows its role. Throughout its history, OPEC has faced the difficult task of holding the cartel in the face of strong incentives by each member to cheat. Today's oil market makes that job easy because nearly every member, except Saudi Arabia, is producing at full capacity. OPEC, more or less, has nothing to do.

In fact, the last time OPEC made a major adjustment to its quotas—September 2007—it jiggered them to reflect what its members were already pumping. Algeria got a big boost because it was already supplying nearly 50 percent more than its quota. Kuwait, Libya and Qatar also got boosts that aligned their OPEC quotas with existing reality. OPEC also set, for the first time, a quota on Angola's output. Since then, Angola has attracted a steady stream of new production projects, which makes it inevitable that OPEC will adjust Angola's quota to reflect the new reality. (Iraq has no quota; it has troubles enough without pretending to align its oil output to OPEC strictures.)

Nigeria and Venezuela got haircuts because their political troubles meant they were already producing far less than their quotas. Indonesia also cut its quota and a few months later left OPEC because it realized that as a big oil user it actually had more in common with oil importers than its fellow OPEC members. These changes in quotas were reflections of political realities that OPEC doesn't control.

Today's oil cartel, even more than in the past, is really about Saudi Arabia. But Saudi Arabia also is no wizard at the controls of the world market. The Saudis can adjust their output a bit since they control nearly all of spare capacity in the world market. (Earlier this month they pledged another 200,000 barrels per day to dampen pressure from the United States and other governments that are reeling from high oil prices. But that move was more symbolic than real as the markets were already expecting the new supplies.)

Saudi Arabia is on the front lines of the new reality in world oil supply. It is proving much harder and more costly to bring on more supplies. The Saudis have an ambitious plan to increase output about one third over the coming decade, but they are finding that will be a stretch. Their fellow OPEC members are in a similar situation, and those hard facts also produce high oil prices. In fact, the Middle East members of OPEC are, today, producing at just the same level as they were three decades ago because none of them invested much in finding and producing new supplies. High prices into the future reflect these fundamental facts rather than the assumption that OPEC is a masterful cartel.

Conventional wisdom holds that because OPEC is raking in more cash than ever, it has never been stronger than it is today. In fact, OPEC has rarely been weaker. It is the accidental beneficiary of forces that have caused today's high prices, and it will be nearly as powerless when prices come down.

The real solutions to today's high oil prices require more attention to demand. Blaming OPEC, while good political theater, won't have much impact. Legislation now working its way through the U.S. Congress would actually attempt to break up the oil cartel. Such schemes won't work, and the political effort would be better spent on policies that redouble the nation's efficiency, producing more oil from diverse sources here at home, and in finding ways to move beyond oil altogether.

The price of a barrel of oil has more than doubled in the past year and a half, from $60 in early 2007 to a high of $142 earlier this summer. This has led to a search for someone to blame for this price increase and for government policies to reduce oil prices.

The actions of energy traders, more pejoratively known as speculators, are being targeted by Ralph Nader, the chief executives of the major domestic airlines and many members of Congress as a major cause of this price increase. However, data from world oil market demonstrates that it is unlikely that speculators have had a noticeable impact on world oil prices.

House Speaker Nancy Pelosi, D-San Francisco, recently called on President Bush "to
draw down a small portion" of the U.S. Strategic Petroleum Reserve to reduce oil prices. But this is unlikely to have a discernible effect on world oil prices.

Oil is a relatively homogenous commodity traded in a world market with a demand of 85
million barrels a day, of which 25 percent is consumed by the United States. The demand for oil is insensitive to changes in the price of oil, particularly in oil-producing countries, where its use may be subsidized. Recent research suggests a 10 percent increase in the price of oil would reduce world demand by no more than 1 percent.

Speculators are accused of increasing the price of oil by taking large financial positions in oil futures markets. But these bets on the future price of oil have no impact on the current price of oil if the current demand equals the current supply, meaning there is no net change in inventories of oil.

According to the U.S. Energy Information Administration, commercial inventories of oil
currently held by the major industrialized countries are below their five-year average. That means consumers are willing to purchase all available supply and run down inventories at the current high price. Given that market outcome, the behavior of speculators cannot be inflating the price.

What would speculators have to do to increase the world price of oil by $25 relative to a
$100 baseline? They would need to buy and put into inventory approximately 2.5 percent of world demand, or approximately 2.125 million barrels a day. Over the course of a year, this would amount to storing 775 million barrels, which is the current amount in the our country's Strategic Petroleum Reserve.

Applying this same logic to Speaker Pelosi's recommendation to draw down a small
portion of the reserve--say 100 million barrels over the course of a three-month period--this 1-million-barrel-a-day increase in supply implies at best a three-month-long $12.50 reduction in the price of oil relative to its current price of $125.

However, according to the Energy Information Administration, world inventories of oil
held by industry and government are on the order of 7 billion to 8 billion barrels. So a more likely outcome of withdrawing 1 million barrels a day from the government's reserves for three months is that privately held inventories would increase one-for-one, and world oil prices would be unaffected.

Although energy traders are a convenient scapegoat for the current high price of oil, the
numbers just don't add up for their actions to have any significant impact on market prices. A strong world demand, not the actions of speculators, is responsible.
But releasing a small amount of oil from the U.S. reserve may still make sense. Given
historically high prices--and the great need for government revenues--this may be a fortuitous time to sell oil and take advantage of the market.
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FRANK A. WOLAK is a professor of economics at Stanford University specializing in the
energy sector. He is chairman of the California Independent System Operator's Market
Surveillance Committee, an independent monitor for the electricity supply industry. He wrote
this article for the Mercury News.