06/15/2013 07:13 EDT | Updated 06/15/2013 07:17 EDT

Paul Krugman: Canadian Economy Vulnerable To 'Shock' Due To Debt Levels, House Prices

SHANGHAI, CHINA - MAY 12: (CHINA OUT) Paul Krugman, Professor at Princeton University and winner of the 2008 Nobel Prize for Economics, gives a speech on May 12, 2009 in Shanghai, China. Krugman warned of a lost decade of growth for the U.S. due to half-measures taken by the Obama administration and spoke of the urgency of a second fiscal stimulas package to boost the U.S. economy. (Photo by Zhu Lan/ChinaFotoPress/Getty Images)

Renowned economist Paul Krugman is worried about Canada’s economy.

The Nobel Prize winner and New York Times columnist wrote in a blog post Saturday that Canada “ought to be quite vulnerable to a big deleveraging shock despite its boring banks.”

By “ought,” he means he’s not quite sure. But he sees warning signs in the fact that a very large spread has developed between U.S. and Canadian house prices, and Canadian household debt levels are reaching levels seen in the U.S. just before that country’s own “deleveraging shock.”

House Prices, U.S. vs. Canada

He sees Canada as a “test case” for theories as to why the U.S. has been struggling for so long to come out of its economic slump.

One such theory -- which Krugman himself gives credence to -- says that it wasn’t the bank crisis that caused the slump, but rather the “overhang of private debt” from the country’s housing bubble.

If that’s the case, Krugman argues, then the fact that Canada’s banks didn’t get involved with the “toxic” mortgage-backed assets that sank U.S. banks won’t stop the country from experiencing the same sort of economic stagnation and high unemployment that has plagued the U.S. for the past half decade.

But for that to happen, the housing market would have to actually crash -- and, as Krugman notes, the market isn’t crashing.

“People have been [predicting a crash] for several years, and it hasn’t happened yet — but remember, the US housing bubble took a long time to pop, too,” he wrote.

Many economists argue that for a bubble to pop, there needs to be an “event” -- such as an economic slowdown, or a bank crisis -- and that no such event is on the horizon for Canada’s economy.

Krugman is not alone in predicting trouble for Canada’s economy. Robert Shiller, the real estate expert whose name is on a U.S. house price index, said he is worried Canada is experiencing a “slow-motion version” of the U.S.’s housing crash.

The Economist and the OECD have both recently declared Canada to have one of the most overvalued housing markets in the developed world, and at least one U.S. hedge fund manager is staking all his clients’ money on a Canadian housing downturn.

But there are plenty who argue the opposite. David Rosenberg, a former Merrill Lynch economist credited with predicting the U.S. financial crisis, said last week those betting against Canada are taking a big risk.

He pointed to the fact that the fundamentals of Canada’s housing market have turned positive recently, after slumping for many months, and that Canada’s bank profits are holding up despite predictions for nearly a year they would turn south.

And there are many who continue to argue it was fraudulent business practices and poor regulation in the U.S. that caused the collapse.

A lot of the problems that generated the crisis in the U.S., they just never happened in Canada,” University of Toronto finance professor Laurence Booth told the Financial Post. The people betting against the Canadian banks “have no idea of the difference between the Canadian and U.S. housing markets.”

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