The recent wave of randomized trials in development economics has provoked criticisms regarding external validity.  We investigate two concerns - heterogeneity across beneficiaries and implementers - in a randomized trial of contract teachers in Kenyan schools.  The intervention, previously...

The size of the informal sector is commonly associated with low per capita GDP and a poor business environment.  Recent episodes of reform and growth in several African countries appear to contradict this pattern.  From the mid 1980's onward, Ghana underwent dramatic liberalization and...

This paper addresses the question as to why we observe such large differentials in earnings in urban African labour markets after controlling for observable human capital.  We first use a three year panel across Ghana and Tanzania and find common patterns for both countries assuming that...

This paper investigates the role of learning - through formal schooling and time spent in the labor market - in explaining labor market outcomes of urban workers in Ghana and Tanzania.  We investigate these issues using a new data set measuring incomes of both formal sector wage workers and the...

The size of the informal sector is commonly associated with low per capita GDP and a poor business environment. Recent episodes of reform and growth in several African countries appear to contradict this pattern. From the mid 1980’s onward, Ghana underwent dramatic liberalization and achieved...

In Ghana there is a highly developed apprenticeship system where young men and women undertake sector-specific private training, which yields skills used primarily in the informal sector. In this paper we use a 2006 urban based household survey with detailed questions on the background, training...

This paper addresses the question as to why we observe such large differentials in earnings in urban African labour markets after controlling for observable human capital. We first use a three year panel across Ghana and Tanzania and find common patterns for both countries assuming that movement...

This paper investigates the role of learning - through formal schooling and time spent in the labor market - in explaining labor market outcomes of urban workers in Ghana and Tanzania. We investigate these issues using a new data set measuring incomes of both formal sector wage workers and the...

In 2003 Kenya abolished user fees in all government primary schools. We find that this Free Primary Education (FPE) policy resulted in a decline in public school quality and increased demand for private schooling. However, the former did not reflect a decline in value added by public schools -...

This paper addresses the questions as to the size and causes of earnings differentials in two urban African labor markets, those of Ghana and Tanzania. We have panel data so we can ask how far time invariant unobservables, market ability for short, matters in the determination of earnings. We...