De Buhr, 2000. ”Measuring the Quality of Life Across Cultures”
Hills & Argyle, 2002. “The Oxford Happiness Questionnaire: a compact scale for the measurement of psychological well-being”
Kashdan, 2004. “The assessment of subjective well-being (issues raised by the Oxford Happiness Questionnaire)
Kubzansky & Thurston, 2007. “Emotional Vitality and Incident Coronary Heart Disease”
Findings indicate that emotional vitality (optimism, curiosity…) not only prevents stress-related conditions by the absence of negative moods and self-destructive habits, but has a measurably positive impact on individuals’ health.
Layard, 2010. “Measuring Subjective Well-Being. How should human happiness and life satisfaction be assessed?”
Oswald & Wu, 2010. “Well-being across America”
Oswald & Wu, 2010b. “Objective Confirmation of Subjective Measures of Human Well-Being: Evidence from the U.S.A”