We assigned two cohorts of kindergarten students, totaling more than 24,000 children, to teachers within schools with a rule that is as-good-as-random. We collected data on children at the beginning of the school year, and applied 12 tests of math, language and executive function (EF) at the end...

Many poor households in developing countries are liquidity-constrained. As a result, they may under-invest in the human capital of their children. We provide new evidence on the long-term (10-year) effects of cash transfers using data from Ecuador. Our analysis is based on two separate sources...

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...

Infrastructure made a net contribution of around one percentage point to Nigeria's improved per capita growth performance in recent years, in spite of the fact that unreliable power supplies held growth back. Raising the country's infrastructure endowment to that of the region's middle-income...