High gas prices and strong oil company earnings have generated a rash of new tax proposals in recent months. Some lawmakers have called for new “windfall profits” taxes—similar to the one signed into federal law in 1980 by President Jimmy Carter—that would tax the profits of major oil companies at a rate of 50 percent. Meanwhile, many commentators have voiced support for the idea of increasing gas taxes to keep the price of gasoline at post-Katrina highs, thereby reducing gas consumption.

However, often ignored in this debate is the fact that oil industry profits are highly cyclical, making them just as prone to “busts” as to “booms.” Additionally, tax collections on the production and import of gasoline by state and federal governments are already near historic highs. In fact, in recent decades governments have collected far more revenue from gasoline taxes than the largest U.S. oil companies have collectively earned in domestic profits.