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In this paper, we study interpersonal comparisons of wellbeing. We show that using subjective wellbeing (SWB) levels can be in conflict with individuals' judgments about their own lives. We propose therefore an alternative wellbeing measure in terms of equivalent incomes that respects individual preferences. We show how SWB surveys can be used to derive the ordinal information about preferences needed to calculate equivalent incomes. We illustrate our approach with Russian panel data (RLMS‐HSE) for the period 1995–2003 and compare it to standard wellbeing measures such as expenditures and SWB. We find that different groups are identified as worst off.
For nothing is more certain, than that despair has almost the same effect on us with enjoyment, and that we are no sooner acquainted with the impossibility of satisfying any desire, than the desire itself vanishes. David Hume, A Treatise of Human Nature

This paper compares the use of equivalent income with that of utility, in the social welfare function, in optimal income tax models. Equivalent income is a money metric welfare measure that, unlike utility, is not affected by monotonic transformations of utility. The use of equivalent income is found to produce an optimal tax rate that is more sensitive to the degree of inequality aversion, compared with the use of utility. With Cobb‐Douglas and CES utility functions, the optimal tax rate is the same for utility and equivalent income where relative inequality aversion is unity. When using equivalent incomes, the case for high marginal rates does not depend on the assumption of a very low elasticity of substitution between consumption and leisure.

1. Background issues -- 2. Indigenous health status in perspective -- 3. Comparing like with like: analysis by income -- 4. Per capita health expenditure by income and Indigenous origin -- 5. Further information on the usage of health services by equivalent income -- 6. Health status by equivalent income -- 7. Conclusion.

For a closed economy with human-made capital, non-renewable resource depletion and (possibly) exogenous, hyperbolic technical progress as explicit-form inputs to a production function, there is a feasible development path that is 'as if' optimal with respect to hyperbolic utility discounting. On this path, typically, welfare-equivalent income > wealth-equivalent income > Sefton-Weale income > net national product, with possibly dramatic differences among these measures; and sustainable income can be greater than, equal to, or less than NNP. For low enough discounting, growing consumption is optimal even when technical progress is zero. A particular discount rate makes all income measures and consumption constant and (except net national product) equal; and zero technical progress then gives the Solow (1974) maximin as a special case. The optimal path is time-consistent because of the way the utility discount rate is chosen to depend on the economy's stocks, and hence on absolute time.