In 'El País' on the new subjective methods of measuring well-being

It examines methodologies for measuring well-being and social happiness, complementing contributions from three international institutions: the Harvard Flourishing Indicator, the Happiness Institute Indicator in Copenhagen, and the Observatory of Intangibles and Quality of Life in Spain.

Article Link (spanish) 

https://elpais.com/salud-y-bienestar/2025-05-29/el-escurridizo-camino-de-la-ciencia-para-medir-la-felicidad-humana-no-hay-metodos-cien-por-cien-fiables.html