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Using changes in the possession of household assets over the past 20 years, several recent papers have argued that economic growth and poverty reduction in Africa was substantially better than suggested by national income data and income poverty statistics, which suffer from well-known weaknesses. We scrutinize these claims and first argue that trends in assets provide biased proxies for trends in incomes or consumption. In particular we show that the relationship between growth in assets and growth in incomes or consumption is extremely weak; instead, we find evidence of asset drift using macro and micro data, which is consistent with the claims we make about possible biases in the use of asset indices. As a result, we find no evidence supporting the claim of an African growth miracle that extends beyond what has been reported in official GDP/capita and consumption figures. [ABSTRACT FROM AUTHOR]

This paper uses OECD data to examine changes in labor productivity, real gross domestic product (GDP) and real gross domestic income (GDI), economic aggregates, and relative economic growth over time. Real GDI combines changes in production (real GDP) with a trading gain derived from relative price changes. The paper considers two sources of trading gains: the terms of trade, and the real exchange rate. For OECD countries, the terms of trade is the more important price ratio, making a contribution to real income growth that is, on average, an order of magnitude larger than the real exchange rate. Over long time periods, the most important source of real income growth is changes in production. Over shorter time horizons, however, the trading gain can make noteworthy contributions. Changes in aggregates like real private consumption, or the relative economic performance of nations, are shown to be particularly dependent on the trading gain during the large swings in resource prices that occurred post-2002. [ABSTRACT FROM AUTHOR]