Stabilizing climate change entails bringing net emissions of carbon dioxide (CO2) to zero. CO2 stays in the atmosphere for hundreds, if not thousands, of years. As long as we emit more than we capture or offset through carbon sinks (such as forests), concentrations of CO2 in the atmosphere will keep rising, and the climate will keep warming. Countries can follow three principles in their efforts to create a zero-carbon future: (a) planning ahead for a future with zero emissions, (b) getting carbon prices and policies right, and (c) smoothing the transition and protecting the poor.

The great 21st-century migration into cities will present both a great challenge for humanity and a significant opportunity for global economic growth. This paper describes the diverse patterns that define this metropolitan migration. It then lays out a framework for understanding the costs and benefits of new arrivals through migration's externalities and the challenges and policy tradeoffs that confront city stakeholders.

Land policies are of fundamental importance to sustainable growth, good governance, and the well-being of, and the economic opportunities open to, both rural and urban dwellers - particularly the poor. To this end, research on land policy, and analysis of interventions related to the subject, have long been of interest to the Bank's Research Department, and other academic, and civil society institutions.

In less than fifty years, Brazil evolved from a predominantly rural society and economy to a highly urbanized country in which 85 percent of its people now live in urban areas and more than 90 percent of the country’s GDP is generated in the cities. This rapid urbanization process was characterized by a lack of planning and an enduring framework of inequality, resulting in high degrees of concentrated poverty in the urban areas. Much of this urbanization has taken place in metropolitan regions (MRs).

Housing matters to the livability of cities and to the productivity of their economies. The failure of cities to accommodate the housing needs of growing urban populations can be seen in the proliferation of poorly serviced, high-density informal settlements. Such settlements are not new in the history of rapidly growing cities, their persistence results as much from policies as from economics and demographic transition. Slums have attracted most of the attention on urban housing in developing countries, and the Millennium Development Goals have given prominence to their reduction.

Cities emerge from the spatial concentration of people and economic activities. But spatial concentration is not enough; the economic viability of cities depends on people, ideas, and goods to move rapidly across the urban area. This constant movement within dense cities creates wealth but also various degrees of unpleasantness and misery that economists call negative externalities, such as congestion, pollution, and environmental degradation.

Turkey’s demographic and economic transformation has been one of the world’s most dramatic, with urban growth and economic growth proceeding hand in hand. Distinguishing Turkey from many other developing countries has been the pace, scale, and geographical diversity of its spatial and economic transformation. Fast-growing secondary cities bring added challenges that define Turkey’s second-generation urban agenda.

This Fifth Edition of the Uganda Economic Update presents evidence that if the urbanization process is well managed, it has the potential to stimulate economic growth and to provide productive jobs for a greater proportion of Uganda’s young and rapidly expanding population. In many countries across the world, the growth of cities has stimulated the establishment and expansion of productive businesses by reducing the distance between suppliers and customers. The growth of cities has also facilitated provision of social services and infrastructure through economies of scale.

Urban areas tend to have much more productive labor and higher salaries than rural areas, and there are vast differences across urban areas. Areas with high salaries and high productivity tend to have employers that invest in much more research and development than areas with low salaries and low productivity. This paper addresses two questions. First, it discusses the causes of these vast geographical differences in wages, human capital, and innovation. The second part of the paper discusses regional economic development policies.

This report focuses on areas with highest potential efficiency gains to increase the value for money from investments in core public goods and services such as extension, irrigation and rural roads. This is a first attempt to carry out such an analysis in Cambodia, and even in the Greater Mekong sub-region. Based on extensive data gathering and surveys, this chapter analyzes the efficiency and effectiveness of agricultural sector expenditures in Cambodia and assesses various options for increasing the impact of government expenditures on agricultural growth.

This report aims to build understanding of the existing disaster risk financing and insurance (DRFI) tools in use in the Solomon Islands and to identify gaps where engagement could further develop financial resilience. It also aims to encourage peer exchange of regional knowledge, specifically by encouraging dialogue on past experiences, lessons learned, optimal use of these financial tools, and the effect these tools may have on the execution of post-disaster funds.

Inexorable urbanization and formalization have been the expectations in development discourse. Indeed, measures of urbanization and formalization have been provided and used as indicators of development. But while urbanization has proceeded apace in developing countries, formalization has slowed significantly over the past quarter century. These disconnect raises questions for development analysis and development policy. Why did one expect urbanization and formalization to go together in the first place?