visions in a telecommunications operator and the core business processes, some of which may run across several areas (e.g. billing) 2.22. Traditional telecommunications operator value chain - a generic model 2.23. There is a new mobile services operational chain in 3G cellular, in AWTs such as WiFi and in a more limited form, in 2.5G 2.24. Main branches or relevance tree 2.25. Dispersion of residency and workplaces with teleworking and teleshopping 2.26. Relevance tree for passenger travel 2.27. Total expenditure on health as percentage of GDP 2.28. Care of frail and elderly at home using telecommunication 2.A1.1. WiBro - key facts and positioning 3.1. Worldwide orders for new power-generation capacity 3.2. OECD electricity sector investment relative to GDP 3.3. Electricity sector investment in the United States 3.4. Annual average capacity additions in developing regions 3.5. World final electricity consumption and gross domestic product 3.6. World GDP and final electricity demand growth in the Reference Scenario 3.7. World final electricity consumption by sector in the Reference Scenario 3.8. World electricity generation in the Reference Scenario 3.9. Share of natural gas in electricity generation by region in the Reference Scenario 3.10. Cumulative world electricity investment in the Reference Scenario, 2003-30 3.11. World electricity consumption in the Reference and Alternative Policy Scenarios 3.12. Fuel shares in electricity generation in the Reference and Alternative Policy Scenarios INFRASTRUCTURE TO 2030: TELECOM, LAND TRANSPORT, WATER AND ELECTRICITY - ISBN 92-64-02398-4 © OECD 2006 TABLE OF CONTENTS 3.13. Change in investment requirements in electricity supply by region in the Alternative Scenario compared with the Reference Scenario, 2003-30 3.14. Debt-equity ratio of power in selected OECD countries 3.15. Investment in electricity infrastructure projects with private participation in developing countries, 1990-2003 5.1. Global water withdrawal predictions 5.2. Global water availability 5.3. Total exp