Poor people often do not make investments, even when returns are high.  One possible explanation is that they have low aspirations and form mental models which ignore some options for investment.  This paper reports on findings of an innovative experiment to test this in rural Ethiopia. ...

The present study employs recent World Bank data to shed light, in a global context, on the transformation of income and inequality changes to poverty reduction for a large number of countries in sub-Saharan Africa (SSA).  The study begins by shedding light on SSA's progress on poverty.  Next,...

Using global data we examine the dynamics of migration from developing to developed countries.  Origin and destination countries are characterized by substantial diffrences in incomes, political rights and cultures.  Incentives as well as costs shape the decision to migrate.  One powerful...

We introduce a new 'supply-push' instrument for foreign aid, to be used together with an instrumental variable estimator that filters out interactive fixed effects.  We use this instrument to study the effects of aid on macroeconomic ratios, and especially the ratios of consumption, investment,...

Because of transportation costs, African manufacturing firms benefit from some market power on their domestic market, where they can charge a higher price than the export price, net of transportation cost. We present a simple theoretical model of an exporting firm that discriminates between the...

We study the origins of adult mental health using early life income fluctuations.  Combining a time series of real producer prices of cocoa with a nationally representative household survey in Ghana, we show that a one standard deviation rise in the cocoa price in early life decreases the...

With serious impacts of climate change looming in a few decades, but currrent poverty still high in the developing word, we ask how to spend development aid earmarked for the poor.  Poverty reduction tends to be strongly linked to economic growth, but growth impacts the environment and...

Agriculture is the largest sector in most sub-Saharan economies in terms of employment, and it plays an important role in supplying food and export earnings.  Rural poverty rates remain high, and labor productivity is strikingly low.  This paper asks how these factors shape the role of...

We quantify the extent to which public-sector employment crowds out private-sector employment using specially assembled datasets for a large cross-sector of developing and advanced countries.  Regressions of either private-sector employment rates or unemployment rates on two measures of...