March 1999 The development community seems to have swung from a denial that aid is fungible to a belief that all aid is fungible. The facts seem to indicate that aid to Africa is partly fungible. Donors should therefore be concerned about the quality of public spending programs in recipient countries. If a donor gives aid for a project that the recipient government would have undertaken anyway, the aid finances expenditures other than the intended project. The notion that aid in this sense may be fungible has recently received empirical support. Devarajan, Rajkumar, and Swaroop look at why aid is fungible or nonfungible, and the extent to which it is fungible in Sub-Saharan Africa. Their results suggest that aid may be partially fungible in Africa and suggest some reasons. They find relatively little evidence that aid leads to greater tax relief in Africa. Every dollar of aid leads to a 90-cent increase in government spending. The implications of this result are by no means clear. If the marginal cost of taxation is exceptionally high-which it might be in African countries-using aid for tax relief may be the best use of foreign resources. Aid's effect on the composition of current and capital spending? They increase equally. Even if all aid were intended to finance capital spending, the reallocation to current spending might not necessarily be harmful. The fungibility of loans to specific sectors generally mirrors patterns found in a broader sample of countries. Aid to energy, transport, and communication sectors increases public spending in those sectors somewhat but by no means one for one. (By contrast, in the worldwide sample, aid to transport and communications was almost fully non-fungible.) Aid to the education sector-which had no discernible effect on education spending in the global sample-had an almost one-for-one effect on education spending in Africa....