| Summary: | This paper examines the performance of World Economic Outlook (WEO) growth forecasts for 2004-17. Short-term real GDP growth forecasts over that period exhibit little bias, and their accuracy is broadly similar to those of Consensus Economics forecasts. By contrast, two- to five-year ahead WEO growth forecasts in 2004-17 tend to be upward biased, and in up to half of countries less accurate than a naive forecast given by the average growth rate in the recent past. The analysis suggests that a more efficient use of available information on internal and external factors-such as the estimated output gap, projected terms of trade, and the growth forecasts of major trading partners-can improve the accuracy of some economies' growth forecasts
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