%0 Journal Article %T Uncertainty in Population Forecasts for the Twenty-First Century %A Nico Keilman %J - %D 2020 %R 10.1146/annurev-resource-110319-114841 %X The aim of this article is to review a number of issues related to uncertain population forecasts, with a focus on world population. Why are these forecasts uncertain? Population forecasters tradit.. %U https://www.annualreviews.org/doi/abs/10.1146/annurev-resource-110319-114841