Long, but interesting:
Aging Baby Boomers and the Generational Housing Bubble: Foresight and Mitigation of an Epic Transition - Journal of the American Planning Association: "Sellers of existing homes provide 85% of the annual supply of homes sold, and home sales are driven by the aging of the population since seniors are net home sellers. The ratio of seniors to working-age residents will increase by 67% over the next two decades; thus we anticipate the end of a generational housing bubble. We also find that younger generations face an affordability barrier created by the recent housing price boom. With proper foresight, planners could mitigate what otherwise could be significant consequences of these projections."