Spain’s inflation-less drop in unemployment is due in large part to its immigration boom. If immigrants’ labour-supply behaviour comes closer to that of natives and inflation remains above target, a deeper slowdown or increasing immigration flows will be needed to bring it down.
This is perfect as a cases study for EC4004, Economics for Business. When we discuss inflation and unemployment, would the same effects hold in Ireland over the past 3/4 years? That's a great FYP thesis right there.