This paper revisits the relationship between energy intensity and economic growth, using a flexible piecewise linear regression model. Based on a panel data set of 137 economies during 1990-2014, the analysis identifies a threshold effect of income growth on energy intensity change: although...

Infrastructure contributed 1.8 percentage points to Côte d'Ivoire's annual per capita GDP growth over the mid-2000s before conflict began to erase the country's infrastructure and its growth contributions. Raising the country's infrastructure endowment to the level of the region's middle-income...

Infrastructure contributed 0.6 percentage points to Ethiopia's annual per capita GDP growth over the last decade. Raising the country's infrastructure endowment to that of the region's middle-income countries could add an additional 3 percentage points to infrastructure's contribution to growth....

Infrastructure improvements contributed 0.6 percentage points to Zambia's annual per capital GDP growth over the past decade, mostly because of exponential growth in information and communication services. The power sector, by contrast, pulled the growth rate down by more than 0.1 percentage...

Infrastructure contributed just over one percentage point to Ghana's annual per capital GDP growth during the 2000s. Raising the country's infrastructure endowment to that of the region's middle-income countries could boost the annual growth rate by more than 2.7 percentage points. Ghana has an...

The Democratic Republic of Congo (DRC) faces possibly the most daunting infrastructure challenge on the African continent. Conflict has seriously damaged most infrastructure networks. Vast geography, low population density, extensive forestlands, and criss-crossing rivers complicate the...