Editorial remarks.-- Open discussion: Regulatory accounting ; A new regulatory model in Bolivia.-- Courses: Policies for sustainable water use and efficient provision of related services.-- News of the Network: Mexico's National Water Programme ; Peru's New Water Resources Law ; Internationalization and business strategies ; UNECE Water Convention.-- Meetings: Regional Conference on Policies for Drinking Water and Sanitation Services ; International Seminar "Infrastructure 2020".-- Internet and WWW News