Houses under construction. © John Hogg/World Bank [[tweetable]]Affordable housing is a major challenge across West Africa, where fewer than 7 percent of households can afford to buy their own home…

Martin Spicer |

“Test and punish”? There’s a debate raging in American schools today: how (and how much) should children be tested? The No Child Left Behind (NCLB) Act created a system where all children in all…

Rafael de Hoyos, Peter Holland |

Street names in Accra, Ghana. Photo credit: Ben Welle/ Flickr CC When I used to work in Rwanda, I lived on a small street in Kigali. Every time I invited friends over, I would tell them to “walk…

Linus Pott |

This page in: Arabic | Français | 中文 In a world divided over how to deal with such serious problems as terrorism, immigration, free trade, and climate change, governments agree on the urgency of…

Luis Triveno, Michael J. Lea |

When I talk to people about impact evaluation results, I often get two reactions: Sure, that intervention delivered great results in a well-managed pilot. But it doesn’t tell us anything about…

David Evans |

“Individuality is the product of both biological inheritance and personal experience, ” said Professor Charles A. Nelson during a recent presentation at the World Bank. Professor Nelson has been…

Magdalena Bendini |

The demand for decent, affordable – and safe – housing for growing urban populations is a nagging problem for financially strapped governments throughout the developing world. According to…

Luis Triveno, Elizabeth Hausler |

Urban population in Africa will double within the next 25 years and reach 1 billion people by 2040, but concentration of people in cities has not been accompanied by economic density. Typical…

Ede Ijjasz-Vasquez, Somik Lall |

Also available in: Español More than two months have passed since the whirlwind that was Habitat III, the UN’s once-every-20-year summit on cities and urban development. From big data to climate…

Sameh Wahba, Sarah Xinyuan Lin |