“…A study by Lenton and Mosley [ 11 ], for instance, comprised both objective and quantitative measures of assets, income and expenditures as well as subjective self-assessments of measures pertaining to wellbeing and responses to questions about feelings and attitudes. Collateralized debt was dealt with in five studies [ 7 , 27 , 12 - 14 ] and non-collateralized debt in six studies [ 28 , 6 , 30 , 22 , 18 ]. However, most of the studies covered both collateralized and non-collateralized debt.…”