Regional integration is seen as a key priority by many developing countries towards achieving economic diversification, industrialization and structural transformation that are critical steps to enable sustainable growth and development. However, for the regional integration process to be successful, it requires that countries can accomplish certain levels of performance in different dimensions of integration. This project precisely aims at strengthening the capacity of selected developing countries to measure, monitor and improve their performance in regional integration within the Africa, Western Asia, and the rest of Asia-Pacific regions. This objective is to be realized through: 1) The provision of a robust regional integration index to be freely and easily accessible to all stakeholders in each of the three main regions of focus; 2) Capacity building and technical assistance offered to selected developing countries on the use of the information generated through the index for better policy making and analysis with a view to improving their own performance in regional integration, with strong emphasis on trade integration.