One possible explanation is that they are concerned about the loss of credibility implied by setting an inflation target of 2% and then failing to come close to it year after year. Another possibility is that the world's major central banks are actually more concerned about real growth and employment, and are using low inflation rates as an excuse to maintain exceptionally generous monetary conditions.
一个可能的解释是它们担心因为将通胀目标设定为２％但年复一年无法接近这一目标而损失信誉。另一个可能性是世界主要央行实际上更担心真实增长和就业，它们用低通胀率作为借口维持极其有利的货币条件。还有第三个解释：央行想维持低利率是为了降低巨额政府债务的预算成本。