Environmental Policy Stringency Index
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Environmental Policy Stringency IndexAbstract

The OECD Environmental Policy Stringency Index (EPS) is a country-specific and internationally-comparable measure of the stringency of environmental policy.
Stringency is defined as the degree to which environmental policies put an explicit or implicit price on polluting or environmentally harmful behaviour.
The index is based on the degree of stringency of 13 environmental policy instruments, primarily related to climate and air pollution.
The index ranges from 0 (not stringent) to 6 (highest degree of stringency) and covers 40 countries for the period 1990-2020.
Last updated: 29 August 2022.
For access to the 2015 EPS vintage, please email EPSindex@oecd.org.

For further details please consult: Kruse, T., Dechezleprêtre, A., Saffar, R., and L. Robert (2022), "Measuring environmental policy stringency in OECD countries – An update of the OECD composite EPS indicator", OECD Economics Department Working Papers, No. 1703, OECD Publishing, Parishttps://doi.org/10.1787/90ab82e8-enDetails on the previous version of the EPS are available in: Botta, E. and T. Kozluk (2014), "Measuring Environmental Policy Stringency in OECD Countries: A Composite Index Approach", OECD Economics Department Working Papers, No. 1177, OECD Publishing, Parishttp://dx.doi.org/10.1787/5jxrjnc45gvg-en