Access to mobile phone has increased substantially over the last decade in sub-Saharan Africa. The evidence suggests that increased use of mobile phones in the region has upgraded the market prices received by producers for their cash crops, but so...
Modelling the underlying long-run trend of metal prices is important, given that selected metals are a source of income for many countries. However, estimating the underlying trend has proven to be difficult, given the persistence and volatility of...
In this study, we develop an empirical framework that allows us to trace out a time path of metal prices. This framework shows that unpredictable shifts in demand, extraction costs and discovery of reserves, make estimation of the slope of this...
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