Economics Correspondent
Just before Christmas, the UN Human Development Index 2020 ranked Ireland joint second in the World across a range of indicators which measure quality of life, just below Norway.
There was a minor kerfuffle on Twitter. Hurrah, shouted some. Bah, shouted others.
Quality of life means many things to many people. Some aspects are measurable; some not.
One aspect is prosperity. And normally, income is used to measure that. Economists can make a stab at guessing what that is. But not without a lot of disagreements and even more caveats.
The International Comparison Programme is a data series going back to 1950, managed by the World Bank. It adjusts measures of income across economies around the globe to allow for comparisons.