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The purpose of this paper is to analyze the suitability of using gross domestic product (GDP) as a proper indicator for sustainability in a given national economy and to identify the main features that a proper measure of sustainability (composed by a set of indicators) should incorporate. After showing the inconveniences of using GDP as an indicator of sustainability for national economies, the authors aim to present complementary indicators to GDP per capita to do this task. They also aim to calculate and discuss the efficiency of OECD countries in terms of achieving sustainable development.

A theoretical framework is proposed based on recent economic studies about sustainability and also on the principles of Catholic social thought. Once complementary indicators to GDP in order to measure sustainability have been proposed, the econometric method data envelopment analysis (DEA) is used to perform an efficiency analysis of the three dimensions of sustainability (social, economic and environmental).

GDP alone is not a proper indicator of sustainability for national economies. Relevant economic literature and also specific documents from Catholic social thought can help when identifying complementary indicators to GDP in order to assess sustainability. Developed economies are able to be efficient in achieving the three dimensions of sustainability at the same time.

The three dimensions of sustainability considered in this paper are the fundamental ones, and can be complemented with new ones. A comparison with other sustainability indices could bring new insights for further research.

In this paper the authors combine recent economic literature with Papal encyclicals and documents from the General Congregations of the Society of Jesus, in order to provide a comprehensive set of indicators to measure sustainability. A DEA analysis has been carried out to calculate efficiency in achieving sustainability for OECD countries.