Between 2019 and 2021, royalty payments from Ireland for the use of intellectual property based in the US grew more than five-fold, from under $20 billion (€18 billion) to over $100 billion annually, according to data reported by the Irish authorities to the OECD. There is just one problem, according to a paper just published by Ana Maria Santacreu and Samuel Moore, economists at the US Federal Reserve Bank of St Louis. The same payments reported from the US side have not changed at all, remaining around the $20 billion mark through the same period. “This stark difference, visible in…