This paper reviews the current problems of national accounting in Sub-Saharan Africa. With the current uneven application of methods and availability of data, any ranking of countries according to gross domestic product levels is misleading. It is increasingly acknowledged that the problems...

We examine economic activity in a large virtual economy which was designed to allow decentralized barter as the sole exchange institution. We find that a small subset of goods emerges endogenously which act of media of exchange. Our analysis includes estimation of spot exchange rates between...