“…First, theory-based approaches (henceforth, TBAs) prescribe a sharp division of labor whereby philosophers should provide general theories of well-being, whereas empirical scientists should develop measures of well-being grounded on philosophers’ theories (e.g. Hassoun, 2019; Sumner, 1996; Van der Deijl, 2017a). Second, evidence-based approaches (henceforth, EBAs) hold that the science of well-being should be grounded on ‘direct measures’ of well-being and take ‘as a prime objective the quantitative study of the determinants of well-being’ (Layard, 2010, p. 535; also Frijters et al, 2020; Seaford, 2011).…”