3. In other words, if we had a magic wand and could perfectly target every extremely poor individual, and magically raise their incomes to the $1.25 per day extreme poverty line, in 2010 the world needed approximately $169 billion per year(in 2005 PPP dollars) to end extreme poverty. The value of the Aggregate Poverty Gap, however, is not the same as the cost of ending cxtreme poverty. It is the size of the problem which is different from the size(cost) of the solution 4. Another way of interpreting the APG/GDP ratio is the fol lowing: Suppose that the real GDP growth for the developing world as a whole is 5 percent per year. If 10 percent of this GDP growth accrued to the 21 percent of the developing world's population who are extremely poor, and this 10 per- cent was distributed in a way that the growth in income of each poor person was exactly his her distance to the s1.25 line, extreme poverty would end in one year 5. The primary data source for the profiles of the poor is the International Income Distribution Database(12D2), a glob ally harmonized database drawn from more than 600 na tionally representative household surveys. See appendix for more detail about the 12D and how global poverty profiles are prepared