This document reports on a study that analyzed the relationship between hedonism and happiness. It summarizes the key findings from the study at both the national and individual level. At the national level, average happiness is positively correlated with acceptance of pleasure and active leisure. At the individual level, happiness is positively linked to hedonistic attitudes and behaviors like frequent sex and moderate consumption of stimulants, though the relationship with smoking follows an inverted U-shape. However, the study only reported correlations and could not determine causation.