Because, while this income-only definition of 'poor' is common and often drive policy, it doesn't match what people intuitively think of as 'needy'. We need an

Because, while this income-only definition of 'poor' is common and often drive policy, it doesn't match what people intuitively think of as 'needy'. We need another map that's based on consumption-poverty, not income-poverty – and controlled for local prices. Unfortunately that data is a lot harder to collect.