So far, growth has been driven by a combination of external resources (aid, debt relief, or commodity windfalls) and the removal of some of the worst policy distortions of the past. Domestic productivity has been given a boost by an increase in demand for domestic goods and services (mostly the latter) and more efficient use of resources.
问题在于这样的表现能否持续。目前，增长的驱动力来自外部资源（援助、债务豁免和商品资源禀赋）以及取消过去的一些最糟糕的政策扭曲。国内生产率因国内商品和服务需求的增长（特别是后者）以及资源的高效使用而获得了提振。麻烦在于未来生产率改进之源来自何方。