China has been experiencing two major demographic sea changes since the late 1970s: (i) Internal migration, primarily rural-to-urban, on a scale that dwarfs all other countries at any time in history; and (ii) a shift in its age distribution. The basic question posed in this paper is: How are...

Post-reform China has been experiencing two major demographic changes, an extraordinary amount of internal migration and an aging population. We present a general migration model which captures the idea that older migrants have shorter durations in the destination but possibly larger general...