Countries differ markedly in the diversification of their exports. Products differ in the number of countries that export them, which we define as their ubiquity. We document a new stylized fact in the global pattern of exports: there is a systematic relationship between the diversification of a...

Loreto is a place of contrasts. Located on the western flank of the Amazon jungle, it is by far Peru’s largest state in terms of size, but also among those with the lowest population density. Its capital, the city of Iquitos, sits on the western bank of the Amazon River, surrounded by...