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The so-called “U6 measure” captures unemployment, underemployment (meaning workers who would like to work more hours) and marginal attachment, namely those workers that are not competing very actively in the labour market, for example because they are not available to start a new job at short notice. This measure currently covers just below 18% of the labour force and is thus considerably higher than the unemployment rate.4 We are experiencing a solid and broad-based economic expansion that is contributing to a narrowing of the output and unemployment gaps. But there still appears to be a disconnect between growth and inflation. As slack in the economy continues to be absorbed, reflationary forces will gradually build up and the traditional Phillips curve relationship between inflation and the business cycle should eventually reassert itself. That being said, current estimates of the slope of the Phillips curve still appear to be flatter than in previous times, which could be interpreted as an indication that the relationship between economic slack and inflation has weakened. A mismeasurement of slack (because of structural changes in the labour market) or an unstable relationship between slack and inflation over time could be among the reasons. At the same time, this effect could also result from discrete parallel shifts in the Phillips curve. Such parallel shifts can arise due to temporary changes in wage and inflation mark-ups, or – more concerning from a central bank’s perspective – the incipient dislodging of inflation expectations.