This paper presents an overview and meta-analysis of the effects of water, sanitation, and hygiene interventions around the world. It is based on 136 impact evaluations (randomized and quasi-experimental studies) that explore the effects of water, sanitation, and hygiene interventions on health...

A meta-analysis of 126 impact evaluation studies finds that financial education significantly impacts financial behavior and, to an even larger extent, financial literacy. These results also hold for the subsample of randomized experiments (RCTs). However, intervention impacts are highly...

There have been many initiatives to improve education outcomes in South Asia. Still, outcomes remain stubbornly resistant to improvements, at least when considered across the region. To collect and synthesize the insights about what actually works to improve learning and other education...

Interventions designed to support small and medium enterprises are popular among policy makers, given the role small and medium enterprises play in job creation around the world. Business support interventions in low- and middle-income countries are often based on the assumption that market...

The WHO has recently debated whether to reaffirm its long-standing recommendation of mass drug administration (MDA) in areas with more than 20 percent prevalence of soil-transmitted helminths (hookworm, whipworm, and roundworm). There is consensus that the relevant deworming drugs are safe and...

Climate change damage (or, more correctly, impact) functions relate variations in temperature (or other climate variables) to economic impacts in various dimensions, and are at the basis of quantitative modeling exercises for the assessment of climate change policies. This document provides a...

The interest rate pass-through describes how changes in a reference rate (the monetary policy, money market, or T-bill rate) transmit to bank lending rates. This paper reviews the empirical literature on the interest rate pass-through and systematizes it by means of meta-analysis and...

Transport corridors can generate wider economic benefits and costs through their effects on a potentially diverse set of development outcomes, such as economic growth, poverty, jobs, equity, environmental quality, and economic resilience. To advance understanding of how corridors could generate...

Carbon taxes can be win-win for Bangladesh. They can help show the world that Bangladesh is serious about climate mitigation, boosting the country's influence in international negotiations and helping it to access financing and technology promised during the COP-21. They can play a role in...

The effectiveness of a demand-driven vocational-training program for disadvantaged youth in Ulaanbaatar, the capital city of Mongolia is assessed through a randomized controlled trial. Mongolia, a transitional country whose economic structure shifted from a Communist, centrally planned economy...