This reflects such problems as macroeconomic management, aid-dependency syndromes, absorption capacity, transaction costs, and − related to all of it − the risk of decreasing returns as aid levels rise. Given the current aid-to-GDP ratios in sub-Saharan Africa − with approximately half of countries yielding ratios of above 10% even before future increases in aid are taken into account − these challenges must be taken seriously.
人们通常比较熟悉非洲的需求，但是增加援助解决这些需求还存在挑战。这反映在宏观经济管理、依赖援助综合症、吸收能力以及交易成本等问题上。而且，与这些问题相关的是，随着援助水平上升存在回报下降的风险。目前萨哈拉沙漠以南非洲国家外援和GDP的比例很高。即使在未来提高援助之前，大约半数国家的比例已经高于10%。有鉴于此，人们必需重视这些挑战。