During the week-end, Philippe Rivière made me discover an interesting problem, “Everyone in a room keeps giving dollars to random others. You’ll never guess what happens next.”f It was coming from a post, a few years ago on decisionsciencenews.com… This problem was mentioned in recent post since it is related to an article published in the American Scientist in november 2019, Is Inequality Inevitable? (that was translated in French last week, for Pour la Science in a section wrongly entitled Economics since it is … <a href=“https://freakonometrics.hypotheses.org/59330"