US economy needs big stimulus but can it afford one?

Bloomberg reports that the US economy is in dire straits.

The engines that have lifted the U.S. economy out of every recession since World War II will be of little help this time around.

Inventory rebuilding, household spending, home construction and payroll growth -- the forces that powered, to a greater or lesser extent, each recovery since 1945 -- may remain missing for much of 2009. A glut of unsold properties may keep housing depressed, while shriveled savings will discourage consumers. Companies may be reluctant to restock and rehire while their profits are squeezed.

So Fed officials are looking for a big fiscal stimulus. From Bloomberg:

Federal Reserve officials, after taking the historic step of cutting the benchmark interest rate to as low as zero, are calling for greater government spending to help revive the U.S. economy.

San Francisco Fed President Janet Yellen said yesterday at an economics conference in San Francisco that “it’s worth pulling out all the stops” with an economic recovery package. Charles Evans, president of the Chicago Fed, told the same gathering he believes a “big stimulus is appropriate.”

Paul Krugman also wants government action.

“If we don’t act swiftly and boldly,” declared President-elect Barack Obama in his latest weekly address, “we could see a much deeper economic downturn that could lead to double-digit unemployment.” If you ask me, he was understating the case.

The fact is that recent economic numbers have been terrifying, not just in the United States but around the world. Manufacturing, in particular, is plunging everywhere. Banks aren’t lending; businesses and consumers aren’t spending. Let’s not mince words: This looks an awful lot like the beginning of a second Great Depression.

So will we “act swiftly and boldly” enough to stop that from happening? We’ll soon find out.

But Willem Buiter thinks the US cannot afford the expected stimulus.

Given the bad fiscal position of the US Federal government and given the vulnerability of the external position of the US and its growing reliance on foreign funding, the scope for expansionary fiscal policy in the US is much more limited than president-elect Obama’s advisers appear to realise. Underneath the effective demand problem is a deep structural rot, especially in household sector and financial sector balance sheets. Keynesian cyclical policy options that would be open to more structurally sound economies should therefore not be tried on anything like the same scale by the US authorities.