As the world becomes increasingly urbanized, the number of megacities is growing rapidly. Today there are 37 cities worldwide with populations of greater than 10 million, and 84 with populations…

Philip E. Karp, Peter Ellis, Barjor Mehta |

[[tweetable]]How fast is your city growing? The answer may depend on where you live.[[/tweetable]] There are the booming megacities such as Tokyo, Mumbai, and Nairobi. Then there are cities that…

Ede Ijjasz-Vasquez, Paula Restrepo Cadavid |

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 |

Photo: Dane Macri/The Advocacy Project via Flickr CC. The relationship between poverty and disability goes both ways: [[tweetable]]disability increases the risk of poverty[[/tweetable]], and[[…

Charlotte McClain-Nhlapo |

Many people were bitterly disappointed when four cases of wild polio were discovered in August 2016 in insecure areas of Borno State in the northeast of Nigeria. Nigeria had gone for almost two…

Mayowa Oluwatosin Alade, Benjamin Loevinsohn, Ayodeji Oluwole Odutolu |

My previous blog post surveyed some of the recent trends in developing global measures of urbanization. In this post, I want to turn to a brief discussion for scholars and practitioners on some…

David Mason |

This satellite image shows Sao Paolo's estimated “urban areas” based on a WorldPop gridded population layer. Areas in yellow are areas with at least 300 people per km2 and a known settlement…

David Mason |

In Côte d’Ivoire, every story counts 6: toward patient-centric hospitals The story of a country’s economic development is often told through the lens of new roads, factories, power plants, and…

Jacques Morisset, Taleb Ould Sid’Ahmed |

Last November, 345 “Zika Warriors” took to the streets of Jamaica to fight the spread of the Zika virus in 30 communities. These local residents trained as vector control aides to prevent Zika…

Silpa Kaza, Lisa Yao, Jiwon Park |

Lynne Sherburne-Benz, World Bank Senior Regional Advisor for Africa, exchanges with young beneficiaries of the Madagascar Social Safety Net Project. I first visited Madagascar in 1985 as a student…

Lynne Sherburne-Benz |