Capability approach

The capability approach (also referred to as the capabilities approach) is a normative approach to human welfare that concentrates on the actual capability of persons to achieve lives they value rather than solely having a right or freedom to do so. It was conceived in the 1980s as an alternative approach to welfare economics.

In this approach, Amartya Sen and Martha Nussbaum combine a range of ideas that were previously excluded from (or inadequately formulated in) traditional approaches to welfare economics. The core focus of the capability approach is improving access to the tools people use to live a fulfilling life. Hence, the approach has a strong connection to intragenerational sustainability and sustainability strategies.

Sen initially argued for five components to assess capability:

Subsequently, in collaboration with political philosopher Martha Nussbaum, development economist Sudhir Anand and economic theorist James Foster, Sen has helped propel the capabilities approach to appear as a policy paradigm in debates concerning human development; his research inspired the creation of the UN's Human Development Index (a popular measure of human development that captures capabilities in health, education, and income). Additionally, the approach has been operationalized to have a high income country focus by Paul Anand and colleagues. Sen also founded the Human Development and Capability Association in 2004 in order to further promote discussion, education, and research on the human development and capability approach. Since then, the approach has been much discussed by political theorists, philosophers, and a range of social scientists, including those with a particular interest in human health.

The approach emphasizes functional capabilities ("substantive freedoms", such as the ability to live to old age, engage in economic transactions, or participate in political activities); these are construed in terms of the substantive freedoms people have reason to value, instead of utility (happiness, desire-fulfillment or choice) or access to resources (income, commodities, assets). An approach to wellbeing using utility can be found in utilitarianism, while access to resources is advocated by the Rawlsian approach.

Poverty is understood as capability-deprivation. It is noteworthy that proponents emphasize not only how humans function, but their access to capabilities "to achieve outcomes that they value and have reason to value". Everyone could be deprived of capabilities in many ways, e.g. by ignorance, government oppression, lack of financial resources, or false consciousness.

This approach to human well-being emphasizes the importance of freedom of choice, individual heterogeneity and the multi-dimensional nature of welfare. In significant respects, the approach is consistent with the handling of choice within conventional microeconomics consumer theory, although its conceptual foundations enable it to acknowledge the existence of claims, like rights, which normatively dominate utility-based claims (see Sen 1979).

In the most basic sense, functionings consist of "beings and doings". As a result, living may be seen as a set of interrelated functions. Essentially, functionings are the states and activities constitutive of a person's being. Examples of functionings can vary from elementary things, such as being healthy, having a good job, and being safe, to more complex states, such as being happy, having self-respect, and being calm. Moreover, Amartya Sen contends that functionings are crucial to an adequate understanding of the capability approach; capability is conceptualized as a reflection of the freedom to achieve valuable functionings.