But the paradox itself is solely

The Easterlin paradox is a finding in happiness economics formulated in 1974 by Richard Easterlin, then professor of economics at the University of Pennsylvania, and the first economist to study happiness data. The paradox states that at a point in time happiness varies directly with income both among and within nations, but over time happiness does not trend upward as income continues to grow: while people on higher incomes are typically happier than their lower-income counterparts at a given point in time, higher incomes don't produce greater happiness over time. One explanation is that one's happiness depends on a comparison between their income and their perceptions of the average standard of living. If everyone's income increases, one's increased income gives a short boost to their happiness, since they do not realize that the average standard of living has gone up. Some time later, they realize that the average standard of living has also gone up, so the happiness boost produced by increased income disappears. It is the contradiction between the point-of-time and time series findings that is the root of the paradox: while there is a correlation at a fixed point, there is no trend over multiple points. That is, in the short run, everyone perceives increases in income to be correlated with happiness and tries to increase their incomes. However, in the long run, this proves to be an illusion, since everyone's efforts to raise standards of living lead to increasing averages, leaving everyone in the same place in terms of relative income. Various theories have been advanced to explain the paradox, but the paradox itself is solely an empirical generalization. The existence of the paradox has been strongly disputed by other researchers.