Note that correlation is logarithmic, meaning that for a linear increase in happiness one needs exponentially more money. Fig. 1 in the article is a semi-log pl

Note that correlation is logarithmic, meaning that for a linear increase in happiness one needs exponentially more money. Fig. 1 in the article is a semi-log plot with a log plot of income vs (linear) life satisfaction. I suspect this study is confirming a result that's already well known because I've heard this result before (linear happiness scales for an exponential increase in wealth).