The financial crisis should give a new impetus to governments’ efforts to improve aid effectiveness. Over the last few months, the governments of OECD countries have pledged trillions of dollars in loans, guarantees, capital injections, and other assistance in their coordinated effort to prop up the global financial system. In comparison, annual aid flows, currently standing at around $100 billion, are just “a drop in the ocean”, in the words of Robert Zoellick, President of the World Bank.