Beware of Runaway Headline Inflation

The latest figures from the US show that the consumer price index rose 0.5% in March, whilst the core personal consumption expenditure price index rose only 0.1%. This column explains the roles of these competing measures and argues that US monetary policymakers should pay close attention to headline inflation. It warns that neglecting headline inflation risks feverish boom-and-bust cycles with prolonged periods of high unemployment.