Thomas Palley, Project Syndicate - WASHINGTON, DC � Over the past eighteen months, oil prices have more than doubled, inflicting huge costs on the global economy. Strong global demand, owing to emerging economies like China, has undoubtedly fueled some of the price increase. But the scale of the price spike exceeds normal demand and supply factors, pointing to the role of speculation � and underscoring the need for policy action to clean up the oil market.
Reflecting their faith in markets, most economists dismiss the idea that speculation is responsible for the price rise. If speculation were really the cause, they argue, there should be an increase in oil inventories, because higher prices would reduce consumption, forcing speculators to accumulate oil. The fact that inventories have not risen supposedly exonerates oil speculators.
But the picture is far more complicated, because oil demand is extremely price insensitive. In the short run, it is technically difficult to adjust consumption. For instance, the fuel efficiency of every automobile and truck is fixed, and most travel is non-discretionary. Though higher airline ticket prices may reduce purchases, airlines reduce oil consumption only when they cancel flights.
This illustrates a fundamental point: in the short run, reduced economic activity is the principle way of lowering oil demand. Thus, absent a recession, demand has remained largely unchanged over the past year.
Moreover, it is relatively easy to postpone lowering oil consumption. Consumers can reduce spending on other discretionary items and use the savings to pay higher gasoline prices. Credit can also temporarily fill consumer budget gaps. Although the housing boom in the United States � which helped in this regard � ended in 2006, consumer debt continues to grow, and America�s Federal Reserve has been doing everything it can to encourage this. Consequently, for the time being the US economy has been able to pay the oil tax imposed by speculators.
Unfortunately, proving that speculation is responsible for rising prices is difficult, because speculation tends to occur during booms, so that price increases easily masquerade as a reflection of economic fundamentals. But, contrary to economists� claims, oil inventories do reveal a footprint of speculation. Inventories are actually at historically normal levels and 10% higher than five years ago. Furthermore, with oil prices up so much, inventories should have fallen, owing to strong incentives to reduce holdings. Meanwhile, The Wall Street Journal has reported that financial firms are increasingly involved in leasing oil storage capacity.
The root problem is that financial markets can now mobilize tens of billions of dollars for speculative purposes. This has enabled traders collectively to hit upon a strategy of buying oil and quickly re-selling it when end users accommodate higher prices � a situation that has been aggravated by the Bush administration, which has persistently added oil supplies to the US strategic reserve, further inflating demand and providing additional storage capacity.
Absent a change in trader beliefs, the current oil price spike will be broken only by a recession that exhausts consumers� capacity to buffer higher prices, or when the slow process of substitution away from oil kicks in. Thus, economic fundamentals will eventually trump speculation, but in the meantime society will have paid a high price.
Whereas oil speculators have gained, both the US and global economies have suffered and been pushed closer to recession. In the case of the US, heavy dependence on imported oil has worsened the trade deficit and further weakened the dollar.
This sobering picture calls for new licensing regulations limiting oil-market participation, limits on permissible trading positions, and high margin requirements where feasible. Sadly, given the conventional economic wisdom, implementing such measures will be an uphill struggle.
But some unilateral populist action is possible. A major form of gasoline storage is the tanks in cars. If people would stop filling up and instead make do with half a tank, they would immediately lower gasoline demand. Given lack of storage capacity, this could quickly lower prices and burn speculators.

Thomas Palley was Chief Economist with the US-China Economic and Security Review Commission and is the author of Post-Keynesian Economics.

Copyright: Project Syndicate, 2008.
www.project-syndicate.org