The "World Economic and Social Survey" provides objective analysis of pressing long-term social and economic development issues, and discusses the positive and negative impact of corresponding policies. The analyses are supported by analytical research and data included in the annex. The "World Economic and Social Survey 2007" analyses the challenges and opportunities associated with ageing populations and aims to facilitate discussions in furthering the Madrid International Plan of Action on Ageing which focuses on three sets of priorities: older people and development; advancing health and well-being into old age; and enabling and supportive environments for older persons. The Survey underscores the need to fully recognize and better harness the productive and social contributions to societies that older persons can make but are, in many instances, prevented from making.