OTHER THAN THATV WHAT WLL YOU DO TO THE ECONOMY, MR. OBAMA?

Robert Mundell: An Economist Who Matters (KYLE WINGFIELD, June 21, 2008, Wall Street Journal)

Robert Mundell isn't in the habit of making fruitless policy recommendations, though some take a long time ripening. Nearly four decades passed between his early work on optimal currency areas and the birth of the euro in 1999 – the same year he received the Nobel Prize for economics. [...]

[M]r. Mundell says "the big issue economically . . . is what's going to happen to taxes."

Democratic nominee Barack Obama regularly professes disdain for the Bush tax cuts, suggesting that those growth-spurring measures may be scrapped. "If that happens," Mr. Mundell predicts, "the U.S. will go into a big recession, a nosedive."

One of the original "supply-side" economists, he has long preached the link between tax rates and economic growth. "It's a lethal thing to suddenly raise taxes," he explains. "This would be devastating to the world economy, to the United States, and it would be, I think, political suicide" in a general election.

Should taxes instead be cut again, I ask him, to stimulate the sluggish economy? Mr. Mundell replies that he favors a ceiling of 30% on marginal rates (the current top rate is 35%). He recounts how the past century experienced a titanic struggle over whether tax rates are too high or too low: from a 3% income tax in 1913; up to 60% during World War I; down to 25% before Congress and President Herbert Hoover raised taxes back to 60% in 1932 and "sealed the fate of our economy for a long, long time"; all the way up to 92.5% during World War II before falling in three steps, reaching 28% under President Ronald Reagan; and back to nearly 40% under Bill Clinton before George W. Bush lowered them to their current level.

In light of this fiscal roller coaster, Mr. Mundell says, "the most important thing that could be done with respect to tax rates now is to make the Bush tax cuts permanent. Eliminating that uncertainty would be more important than pushing for a further cut – in the income tax rates, anyway."

One tax that he would cut, to 25%, is the corporate tax rate. "It could be even lower," he says, "but I think it would be a big step to lower it to 25% . . . I made that proposal back in the 1970s."