https://phys.org/news/2018-06-happiness-index.html

"At the moment, happiness indexes are based on questionnaires that a certain sample of the population answer. They are therefore very subjective values. Unlike these, our index is created based on objective data, official statistics that represent a country's entire population," explains Joan C. Micó, researcher at the Multidisciplinary Mathematics Institute of the UPV.

Among its novelties, the index also stands out for including new quantitative variables such as the quality of education, migration and the exporting and importing of goods and services.