Rethinking how we measure extreme poverty

Many of us can recall when we first discovered there were more than a billion people
in the world who lived on “a dollar a day”. This extreme poverty line been effective at
raising awareness of the goals of development. But, if we want to eradicate poverty
rather than describe it, is it a useful tool – and what could improve on it? Charles
Kenny discusses how the line is drawn, and how it could be improved, with Tim
Phillips.