Recently economists have expressed increasing interest in studying the determinants of happiness. Their main task has been to identify economic and non-economic sources of well-being to define policies aimed at maximising happiness in nations. As yet, it has not been precisely explained why ‘happiness economics’ is actually a part of economic science. In this article, we show that happiness can be an economic concept providing a critical review of the literature on (a) economic applications of happiness data and (b) economic consequences of happiness. Happiness data have been used to analyse microeconomic phenomena and to value non-market goods. Happiness may act as a determinant of economic outcomes: it increases productivity, predicts one’s future income and affects labour market performance. A growing number of happiness studies indicate a role of personality traits in understanding the link between well-being and economic outcomes.

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