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Diagnosing depression

Dec 30th 2008
The Economist

What is the difference between a recession and a depression?

Before the 1930s all economic downturns were commonly called depressions. The term “recession” was coined later to avoid stirring up nasty memories.

THE word “depression” is popping up more often than at any time in the past 60 years, but what exactly does it mean? The popular rule of thumb for a recession is two consecutive quarters of falling GDP. America’s National Bureau of Economic Research has officially declared a recession based on a more rigorous analysis of a range of economic indicators. But there is no widely accepted definition of depression. So how severe does this current slump have to get before it warrants the “D” word?

A search on the internet suggests two principal criteria for distinguishing a depression from a recession: a decline in real GDP that exceeds 10%, or one that lasts more than three years. America’s Great Depression qualifies on both counts, with GDP falling by around 30% between 1929 and 1933. Output also fell by 13% during 1937 and 1938. The Great Depression was America’s deepest economic slump (excluding those related to wars), but at 43 months it was not the longest: that dubious honour goes to the one in 1873-79, which lasted 65 months.

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A standard recession usually follows a period of tight monetary policy, but a depression is the result of a bursting asset and credit bubble, a contraction in credit, and a decline in the general price level. In the Great Depression average prices in America fell by one-quarter, and nominal GDP ended up shrinking by almost half.

Yes, we have no bananas

Where does that leave us today? America’s GDP may have fallen by an annualised 6% in the fourth quarter of 2008, but most economists dismiss the likelihood of a 1930s-style depression or a repeat of Japan in the 1990s, because policymakers are unlikely to repeat the mistakes of the past. In the Great Depression, the Fed let hundreds of banks fail and the money supply shrink by one-third, while the government tried to balance its budget by cutting spending and raising taxes. America’s monetary and fiscal easing this time has been more aggressive than Japan’s in the 1990s.

However, these reassurances come from many of the same economists who said that a nationwide fall in American house prices was impossible and that financial innovation had made the financial system more resilient. Hopefully, they will be right this time. But this crisis was caused by the largest asset-price and credit bubble in history—even bigger than that in Japan in the late 1980s or America in the late 1920s. Policymakers will not make the same mistakes as in the 1930s, but they may make new ones.

In 1978 Alfred Kahn, one of Jimmy Carter’s economic advisers, was chided by the president for scaring people by warning of a looming depression. Mr Kahn, in his next speech, simply replaced the offending word, saying “We’re in danger of having the worst banana in 45 years.” America’s economy once again has a distinct whiff of bananas.

www.economist.com/finance/displaystory.cfm?story_id=12852043

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