Ninety per cent of all the worlds data were generated in the last two years alone. Big data and the Internet of things are more than buzzwords: the data revolution is transforming the way economies and societies are functioning across the planet.Ninety per cent of all the worlds data were generated in the last two years alone. Big data and the Internet of things are more than buzzwords: the data revolution is transforming the way economies and societies are functioning across the planet. This is an opportunity that should not to be missed: more and better data can help boost inclusive growth, fight inequalities and combat climate change. These data are also essential to measure and monitor progress against the Sustainable Development? Goals. The value of data in enabling development is uncontested. Yet, we still lack good quality data in most developing countries. Why are over half of deaths and one-third of births worldwide unaccounted for? Why is investment in statistical capacity - 0.25% of ODA - not a priority for most providers of development assistance? There is a need for stronger political leadership, greater investment and more collective action to bridge the data divide. This report makes a strong business case for strengthening national statistical systems. With the unfolding data revolution, developing countries and donors have a unique chance to act now to boost data production and use for the benefit of citizens. This volume sets out a number of priority steps and good practices that will help policy makers and providers of development assistance to make data work for development.The OECD is an international organization that consists of 30 Member countries from the developed world that accept the principles of representative democracy and free market economy. It originated in 1948 as the Organization for European Economic Cooperation (OEEC) to help administer the Marshall Plan for the reconstruction of Europe after World War II. Later its melãì