I read, a few days ago, that Bucharest, Romania,was the 10th least expensive city in the World. I've visited Bucharest,several times, most recently, about a year ago. very affordable, but one of the cheapest? Nunca.. This was on the "Moneyist" website, which I had never heard of. I wrote to the writer.. His reply was that he got the info from The Economist.
In ranking cost of living comparisons, I assume they mean Argentina, not Buenos Aires. If you look at at list of countries with the highest inflation, Argenuela, is almost at the bottom .For cost of living comparisons I check Numbeo.
In the EEUU The Economist reporting would be called "Fake News".
This morning, I read on Buenos Aires Tripadvisor Forum, a Brit said that restaurant prices in BA are higher than in London and Paris. OMG !