Why Africa’s development model puzzles economists

IT IS easy to buy a rolex in Uganda—albeit not one that will tell the time. Sold at ubiquitous roadside stalls, the Ugandan rolex is a greasy snack, made from an omelette wrapped in a chapati (“roll eggs”). Sellers compete side-by-side for the same custom. So do the motorcycle-taxi drivers, hustling for rides; or the countless small shopkeepers, stocking near-identical goods. In Uganda, as in much of Africa, the informal service economy is a crowded place to be. But it is hard to find work anywhere else.