The first pandemic of the 21st century has brought Pyrrhic attention to one of the era's greatest megatrends - population ageing. Today rich countries are disproportionately affected but increasingly the world's elderly are residents of developing countries. In rich and poor countries alike, a...

Many models have been proposed to explain both the rapidity of China’s fertility decline after the 1960s and the differential timing of the decline in different places. In particular, scholars argue over whether deliberate policies of fertility control, institutional changes, or general...