Going the Last Mile (with Evidence)
In the spring of 2022, a team of economists and public health researchers led by Mushfiq Mobarak, Niccolò Meriggi, and Maarten Voors spent weeks bumping along rough, gullied roads in rural Sierra Leone. It was hot and humid, but at least it was the dry season: Sierra Leone has the highest annual precipitation in West Africa, and most roads are unpaved, so when the downpours come, the roads become mud-slathered,…

