This Job is “Getting Old”: Measuring Changes in Job Opportunities using Occupational Age Structure
利用职业年龄结构来衡量就业机会的变化，对劳动经济学家和关注就业趋势的研究者有用。
This Job Is "Getting Old": Measuring Changes in Job Opportunities Using Occupational Age Structure by David Autor and David Dorn. Published in volume 99, issue 2, pages 45-51 of American Economic Review, May 2009