Natural resource-rich countries tend to have slower economic growth than resource-poor countries, known as the natural resource curse. A recent study found that from 1970 to 1990, resource-intensive countries had slower growth, but from 1990 to 2010, natural resource abundance actually boosted economic growth. The Dutch disease theory, which suggests that resource booms harm other sectors, was not supported by the data. Manufacturing sectors in resource-rich countries grew enough to counteract any negative effects.