 Against these claims, some authors have argued that absolute income has a large impact on happiness across the income spectrum (e.g., Stevenson and Wolfers 2008). The question continues to be much debated, but in 2010 a pair of large-scale studies using Gallup data sets, including improved measures of life satisfaction and affect, suggested that both sides may be partly right (Kahneman and Deaton 2010; Diener, Ng et al. 2010). Surveying large numbers of Americans in one case, and what is claimed to be the first globally representative sample of humanity in the other, these studies found that income does indeed correlate substantially (.44 in the global sample), at all levels, with life satisfaction—strictly speaking, a “life evaluation” measure that asks respondents to rate their lives without saying whether they are satisfied. Yet the correlation of household income with the affect measures is far weaker: globally, .17 for positive affect, –.09 for negative affect; and in the United States, essentially zero above $75,000 (though quite strong at low income levels). For more recent discussions of empirical work, see Jebb et al. 2018 along with relevant chapters in Diener et al. 2018 and the annual World Happiness Reports from 2012 onward (Helliwell et al. 2012). Research on the complex money-happiness relationship resists simple characterization, but a crude summary is that the connection tends to be positive and substantial, strong at lower income levels while modest to weak or even negative at higher incomes, and stronger and less prone to satiation for life evaluation than emotional well-being metrics. But again, these are very rough generalizations that gloss over a variety of important factors and admit of many exceptions across both individuals and societies.