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Wellbeing, Freedom and Social Justice The Capability Approach Re-Examined, 2017a

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4. Critiques <strong>and</strong> Debates<br />

207<br />

<br />

When Amartya Sen introduced the capability approach in economics,<br />

there was some scepticism about its potential for empirical research. For<br />

example, Robert Sugden (1993, 1953) famously wrote:<br />

Given the rich array of functionings that Sen takes to be relevant, given<br />

the extent of disagreement among reasonable people about the nature<br />

of the good life, <strong>and</strong> given the unresolved problem of how to value<br />

sets, it is natural to ask how far Sen’s framework is operational. Is it<br />

a realistic alternative to the methods on which economists typically<br />

rely — measurement of real income, <strong>and</strong> the kind of practical cost-benefit<br />

analysis which is grounded in Marshallian consumer theory?<br />

What Sugden <strong>and</strong> other early welfare economic critics of the capability<br />

approach, such as John Roemer (1996, 191–93) were looking for, is<br />

a theory that is fully formalised <strong>and</strong> provides a neat algorithm to<br />

address questions of evaluation <strong>and</strong>/or (re-)distribution, resulting in<br />

a complete ranking of options. That requires two things: first, to be<br />

able to put the capability approach in a fully formalized model which<br />

can be econometrically estimated. This requires us to move beyond<br />

the welfare economic models as we know them, <strong>and</strong> may also require<br />

the collection of new data (Kuklys 2005). In addition, it requires us to<br />

accept that the different dimensions (functionings <strong>and</strong>/or capabilities)<br />

are commensurable, that is, have a common currency that allows us to<br />

express the value of one unit of one dimension in relation to the value<br />

of one unit of another dimension. One-dimensional or aggregated<br />

evaluative spaces are, ultimately, a necessary condition for conducting<br />

empirical work in contemporary mainstream welfare economics. Yet<br />

there may well be a trade-off between the number of dimensions <strong>and</strong> the<br />

informational richness of the evaluative space on the one h<strong>and</strong>, <strong>and</strong> the<br />

degree to which the theory can be formalised <strong>and</strong> can provide complete<br />

orderings of interpersonal comparisons on the other h<strong>and</strong>. Some<br />

welfare economists are working on the question of how to aggregate<br />

the many dimensions such that one has, in the end, one composite<br />

dimension to work with, but it should be obvious that this is not the<br />

only way to develop capabilitarian welfare economics. <strong>The</strong> alternative<br />

is to stick to the view that wellbeing is inherently multidimensional,

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