The Berlin Workshop Series 2009 presents selected papers from meetings held from September 30 - October 2, 2007, at the tenth annual forum co-hosted by InWEnt and the World Bank in preparation for the Bank's World Development Report. At the 2007 meetings, key researchers and policy makers from Europe, the United States, and developing countries met to identify and brainstorm on spatial disparities and development policy, which are later examined in depth in the 'World Development Report 2009'. This volume presents papers from the Berlin Workshop sessions on issues relating to understanding spatial trends: perspectives and models; new economic geography and the dynamics of technological change: implications for developing countries; perspectives on rural-urban transformation: leading, lagging and interlinking places; spatial disparity and labor mobility; country realities and policy options; learning from Europe's efforts at integration and convergence; and spatial policy for growth and equity.