Yet since the Fed made that its target in early 2012, it has persistently fallen short (see chart).
Had it not, American GDP would have persistently fallen short of potential (because so much American consumption was being satisfied by foreign, rather than domestic, production) and inflation would have fallen below the Fed's informal target of 2%.
"You'll see an older man with physical disabilities who hoards and who persistently falls at home because of the environmental hazards," said Dr. XinQi Dong, associate director of Rush University Medical Center's Institute for Healthy Aging in Chicago.
But persistently falling prices would constrain central banks' ability to boost growth, because they would be unable to push interest rates below inflation ie, make them negative in real terms.
Brief periods of falling prices – particularly if concentrated among one or two commodities – can be good news; but economists fret about periods of persistently falling prices, which can undermine spending and investment and feed through to wages, as consumers and businesses delay spending, expecting goods to be even cheaper in future.
Persistently falling prices also were at the heart of Japan's so-called lost decade after the catastrophic collapse of its real estate bubble at the end of the 1980s — a period in which some experts now find parallels to the American predicament.
Meanwhile, energy prices excluded, inflation has persistently fallen short of the Fed's 2% target.In this section Hitting the roof Sound the retweet Bali high Dove ascendant Middle worth Gearing up for business The FX is in Knowledge for earnings' sake ReprintsMs Yellen is not alone in believing that unemployment is a bigger problem than inflation.
Since 2008 America and much of the world have struggled with slack demand and high unemployment while inflation, excluding energy, has persistently fallen short of the Fed's 2% target.Ms Yellen is not alone in believing that unemployment is a bigger problem than inflation now.
In Fig. 4 five qualitatively different cases of system development are shown: (a) quick convergence, (b) delayed convergence, (c) intermittent episode of divergence, (d) bad convergence; and (e) the persistently falling back onto a wrong trajectory, when the optimal trajectory has already been learned.
