The world of work is changing and it's become a matter of life and death. Life expectancy in America is declining especially among those whose work and prospects have disappeared. Michael Goldfarb speaks with Princeton University economics professors Anne Case and Angus Deaton about their research into the causes of declining life expectancy and the prospects for the future as technology makes many forms of work obsolete. Hand loom weavers disappeared at the start of the industrial revolution, what forms of work will disappear in the 21st century?