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              Haller, M. & Hadler, M. (2006). How social relations and structures can produce happiness and unhappiness: an international comparative analysis. Social Indicators Research, 75(2), 169-216.https://doi.org/10.1007/s11205-004-6297-y
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              Haller, M. & Hadler, M. (2006). How social relations and structures can produce happiness and unhappiness: an international comparative analysis. Social Indicators Research, 75, 169- 216
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