Ali, Ridwan; Alwang, Jeffrey; Siegel, Paul B. - Economics Research, World Bank Group - 1991
Malawi, Tanzania, and Zimbabwe depend heavily on export earnings from a narrow base of agricultural commodities (coffee, cotton, sugar, tea, and tobacco). This dependence increased between 1961 - 1973 and 1974 - 1987, when international prices for those commodities were declining and unstable....