Children in Koutoukalé, Niger Have you ever wondered how your life chances are affected by where you were born? Odds of being born at all are already miraculously small, but only one in ten of us…

Maximilian Leo Hirn, Aude-Sophie Rodella |

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 |

A new study finds that child marriage could cost developing countries trillions of dollars by 2030, with the largest economic cost coming from its impact on fertility and population growth.…

Quentin Wodon, Suzanne Petroni |

Entering data. Photo: World Bank In the fiscal transparency arena, people often hear two conflicting claims. First, governments complain that few people take advantage of fiscal information that…

Paolo de Renzio, Massimo Mastruzzi |

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 |

Globally 2.9 million people died from household air pollution in 2015, caused by cooking over foul, smoky fires from solid fuels such as wood, charcoal, coal, animal dung, and agricultural crop…

Ernesto Sanchez-Triana, Bjorn Klavdy Larsen |