GDP per hour worked is the normal way in which we measure – and compare – national productivity.
This is at best a ‘blunt instrument’. There are so many factors that affect GDP besides productivity.
So, when you read that, say, UK productivity is low compared to another country – take the information with ‘a pinch of salt’.
I think the way in which we measure national productivity requires review, if not an overhaul. We need to look at social and environmental factors so that we include societal and planetary well-being.