Bifurcation theory provides a mathematical framework for understanding qualitative changes in the dynamics of systems as parameters vary. In the context of age-structured population models, this ...

The dynamics of family structure is undergoing a transformation. Declining fertility and mortality rates are leading to new kinship configurations worldwide. But how quickly are changes taking place?

On a global level, religious groups expand and shrink due to a mix of factors. Demographic factors, such as age structure, fertility and mortality (or life expectancy), tell us whether people in ...