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La présente publication examine les avancées récentes de l’analyse coûts-avantages (ACA) environnementale. Celle-ci correspond à l’application de l’ACA aux projets ou aux politiques qui visent explicitement à améliorer la qualité de l’environnement ou qui ont, d’une manière ou d’une autre, un effet indirect sur les milieux naturels. Cette publication s’appuie sur l’ouvrage précédent de l’OCDE rédigé par David Pearce et al. (2006), qui partait du constat que la conjonction d’un certain nombre d’avancées de l’ACA modifiait la manière dont bien des économistes recommanderaient de mettre en œuvre cet instrument, surtout dans le contexte de projets ou de politiques ayant des impacts environnementaux considérables.Cette publication n’a pas seulement pour principal objectif d’évaluer les progrès accomplis : elle cherche également à déterminer en quoi certaines évolutions illustrent des questions thématiques centrales ayant des conséquences pour l’application concrète de l’ACA environnementale dans le cadre de l’élaboration des politiques et de l’évaluation des projets d’investissement.Le thème sans doute le plus important a trait à la contribution de l’économie du climat face au défi que constitue l’évaluation des mesures publiques visant à atténuer le changement climatique (ou à s’y adapter). Les travaux dans ce domaine ont accru l’intérêt porté au mode d’évaluation des coûts et des avantages à très long terme et ils ont notamment montré à quel point les procédures classiques de détermination du taux d’actualisation social deviennent problématiques dans un contexte intergénérationnel et quelles pourraient être les nouvelles approches requises. La contribution de l’économie du climat a également suscité une réflexion plus poussée sur l’incertitude dans le cadre de l’ACA, en particulier en présence d’effets incertains qui peuvent avoir des impacts (négatifs) de grande ampleur.

Kazakhstan has recorded impressive economic growth rates since its independence, driven mainly by export of commodities and high rate of energy use. These rates are not sustainable and are generating significant air pollution, in particular from industrial stationary sources. This is putting at risk the country’s development ambitions to become one of the top global economies by 2050 and converge towards OECD living standards. Building on OECD previous analysis, this publication shows that Kazakhstan’s environmental payments (environmentally related taxes, non-compliance penalties and compensation for damage regulation) for industrial air pollutants, as currently applied, impede energy efficiency and pollution abatement with heavy-handed non-compliance responses and focus on rising revenues. They also add to the cost of doing businesses in the country with limited environmental benefit. In the spirit of the Polluter-Pays Principle, much more reforms of regulation of environmental payments are needed. This report provides guidelines for reform drawing from air pollution regulations in OECD member countries and the results of the analysis of the system in Kazakhstan carried out by the OECD in close co-operation with the Government of Kazakhstan.

This report aims to support the development of a sound economic regulatory system for the water supply and sanitation (WSS) sector in the Republic of Moldova (hereafter 'Moldova'). The prevailing policy framework calls for drastic developments in WSS to modernise and optimise WSS systems and improve operational efficiency (non-revenue water, staff-output ratios etc.) – in line with domestic and international commitments (including the Association Agreement with the European Union, the Sustainable Development Goals, the Paris Agreement and the national WSS strategy). This report outlines ways and means for strengthening the capacity of the Moldovan government to provide sound regulation and that of WSS operators to deliver higher standards of service while ensuring the affordability of WSS services. Such a transition cannot happen overnight. It requires a sound economic regulatory system conducive to affordability, cost recovery and debt servicing, and a realistic performance improvement path for water utilities.

Indonesia is the world’s fourth most populated country, and the largest archipelagic one. Vibrant economic growth has lifted millions of people out of poverty. Economic success, however, has come at a high environmental cost. Rapid land-use change and reliance on fossil energy make Indonesia one of the world’s largest greenhouse gas emitters. Deforestation and pollution are putting pressure on its megadiverse ecosystems. Environmental services such as water supply, sanitation and waste management need to be further expanded and improved. Advancing to a greener economy will require continued efforts to develop policies, strengthen institutions and secure sufficient resources. This is the first Green Growth Policy Review of Indonesia. It examines progress towards sustainable development and green growth, with a special emphasis on the nexus of land use, ecosystems and climate change.