Therefore, some comparisons should be made with caution. This is the case even in countries that have largely decentralised the responsibilities for water resource management and service delivery (Argentina, Brazil and Mexico). Joint role” refers to a situation where roles and responsibilities regarding water policy are evenly distributed across central and sub-national governments. Dominant role” refers to a situation where the central government retains the majority of roles and responsibilities related to water policy Source: Based on results from OECD (2011), “OECD Survey on Water Governance 2010-2011”, OECD, Paris, survey conducted in 2011, www.oecd.org/dataoecd/37/39/44689618.pdf.