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...

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...