Oihana Aristondo, a researcher at the UPV/EHU-University of the Basque Country, has succeeded in expressing the poverty index of a country using a mathematical formula based on three variables. She has reported on her results in the International Journal of Approximate Reasoning. Aristondo has analysed the change in the levels of poverty between 2005 and 2011 in 25 European countries and has indicated what caused this change—variation in the number of poor people, intensity of poverty and the differences between poor people.
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