Developed countries are motivated by several forces when allocating aid to developing countries. The forces could be humanitarian in one country, and commercial self-interests in another. The principal objective of this study was to determine the effectiveness of aid as a promotional strategy for trade, and to investigate whether major donor countries are optimally allocating their aid resources to increase their export and total trade. Models were developed to explore the effectiveness of aid as a promotional instrument for exports and total trade. Donor exports and total trade were expressed as functions of aid, per capita GNP of the recipient country, and aid from competing donors. The study showed that exports and total trade responded to total expected aid contributions and per capita GNP of the recipient countries. Also, all donors, but one, were maximizing the returns to aid, given the level of trade with recipient countries and will be reluctant to increase aid flows, given the current trade level.