Comment by dosinga

I don't know. The World Happiness Report relies on one simple question, which is easy to criticise but at least it applies a clear and consistent method. The paper referred to does not. It uses a special US dataset for states and a much smaller global dataset for every other country, then treats the results as if they measure the same thing. This setup almost guarantees that US states look unusually good. The authors present this as evidence, but it mostly reflects differences in survey design rather than real differences in wellbeing. In that sense the methodological problems here are more serious than the ones they point to in the World Happiness Report.