As evidence from rigorous impact evaluations grows in development, there have been more calls to complement impact evaluation analysis with cost analysis, so that policy makers can make investment decisions based on costs as well as impacts. This paper discusses important considerations for...

This research analyzes the success of the infrastructure projects financed by the World Bank, focusing on the causal link between the quality of project implementation and its outcome. The results show that the success of infrastructure projects depends fundamentally on the quality of...

Development practitioners are coming to a consensus that participation by the intended beneficiaries improves project performance. But is there convincing evidence that this is true? Skeptics have three objections: 1) quot;Participation is not objective -- project rankings are subjective; 2) this...

This study uses loan-level data on syndicated lending to a large sample of developing countries between 1993 and 2017 to estimate the mobilization effects of multilateral development banks (MDBs), that is, their ability to crowd-in capital from private creditors. Controlling for a large set of...

The role of' first movers' in fragile states is critical: they grow and diversify markets in ways that no other firms do, generating disproportionate impact in terms of development and stability. But pioneer firms are rare in fragile states. This study documents their profile, their challenges,...

This paper argues for a novel approach to financing infrastructure needs in Arab countries. It first describes the context of rising public debt in the region, contrasting it with the vast infrastructure needs. It then discusses the challenges in meeting these needs with traditional financing....

Over the past decade, donors of foreign aid quadrupled their annual contributions to trust funds at the World Bank. This earmarking of contributions to donors' preferred recipient countries and issues has raised concerns about the alignment of trust funds with the performance-based allocations...

Sovereign wealth funds represent a large and growing pool of savings. An increasing number of these funds are owned by natural resource?exporting countries and have a variety of objectives, including intergenerational equity and macroeconomic stabilization. Traditionally, these funds have...

This paper provides an overview of the history of development research at the World Bank and points to new future directions in both what we research and how we research. Six main messages emerge. First, research and data have long been essential elements of the Bank's country programs and its...

The World Bank Group recently adopted the "cascade framework" to "maximize finance for development." The cascade recommends that reforms be tried first, followed by subsidies, and then public investments. To understand the economics of the cascade, this paper presents a model where reforms,...