The global economy全球经济
Another year of living dangerously又是如履薄冰的一年
Turmoil in the Middle East and disaster in Japan arouse economic angst. Central banks must not make it worse
THIS was supposed to be a stress-free year for the global economy. By January the financial crisis had faded and Europe’s sovereign-debt crisis seemed less acute. America’s economy was resurgent. Investors piled into equities and sold some of the government bonds they’d bought for troubled times. If there was a worry, it was that emerging economies would grow too quickly, inflating commodity prices.
The year without crisis is not to be. First, Arabian upheaval put oil markets on edge. Then earthquake, tsunami and a nuclear accident clobbered the world’s third-largest economy. How much of a setback to growth do these twin crises represent? And how should economic policymakers react to them?
Japan’s share of world output has been shrinking for decades, but at 9% it remains large enough for the hit to the country’s growth to subtract noticeably from global output. Then there are the ripple effects on the rest of the world. Japan is a large—in some cases the sole—supplier of intermediate goods to the world’s electronics and automotive industries, from the hardened glass on Apple’s iPad to gearboxes in Volkswagens. Many makers of such parts have had to slow or halt shipments because of damaged roads, power cuts or the loss of components from their own suppliers. The effects have spread well beyond Japan, causing shutdowns from South Korea to Spain. Still, the history of such disasters is that much of that lost production is eventually recovered and reconstruction delivers a fillip to subsequent growth.
Pinpointing the impact of Arab political turmoil is complicated by the fact that oil prices were already rising thanks to a brighter global economic outlook. Nonetheless, a good portion of this year’s 25% increase seems due to worries over supplies. A rule of thumb holds that a 10% increase in the price of oil trims 0.2 percentage points from global growth. At the start of the year, the world looked likely to grow by 4-4.5%. A crude estimate is that the two crises will subtract between a quarter and half a percentage point from that.
That may not capture the full effect. Crises by their nature generate clouds of uncertainty (see article). Businesses postpone capital spending and hiring until the clouds clear. Investors seek the safety of bonds and lose their taste for equities.