1. Argyle, M., Martin, M., & Crossland, J. (1989). Happiness as a function of personality and social encounters. In J. P. Forgas & J. M. Innes (Eds.), Recent advances in social psychology: An international perspective (pp. 189–203). Amsterdam: Elsevier Science.
2. Aronsson, T., & Löfgren, K. (2007). Welfare theory: History and modern results. Umea economic studies, Nª 726, from Umeå University, Department of Economics.
3. Blanchflower, D. G., & Oswald, A. J. (2001). Well-being over time in Britain and the USA (The Warwick Economics Research Paper Series (TWERPS)). University of Warwick, Department of Economics.
4. NBER Working Papers 10499;DG Blanchflower,2004
5. Bourdieu, P. (2005). The social structures of the economy. Cambridge: Polity Press.