Some of the River Basin Authorities integrate intra-regional stakeholders, others function inter-regionally, which increases the complexity and the risk for tension among the various stakeholders. They have been established mainly for hydrological issues (water scarcity, quantity and quality aspects), but are still rare for economic and financial information (tariffs, infrastructure financing, etc.) Source: OECD (2011), Water Governance in OECD Countries: A Multi-level Approach, OECD Studies on Water, OECD Publishing, Paris, doi: 10.1787/9789264119284-en. While the Strategic Environmental Evaluations (EAEs) are intended to take into account the impact of PRs and other regional plans on ecosystems, in practice, the EAEs have not yet had much effect on mitigating the potential impact of urban expansion on biodiversity.