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working paper

Identifying priority value chains in Ghana

This working paper identifies agricultural activities and value chains in Ghana whose expansion is most effective at generating economic growth, reducing national and rural poverty, creating jobs, and improving nutrition by diversifying diets. The…

discussion paper

Correlated non-classical measurement errors, ‘second best’ policy inference and the inverse size-productivity relationship in agriculture

We show analytically and empirically that non-classical measurement errors in the two key variables in a hypothesized relationship can bias the estimated relationship between them in any direction. Furthermore, if these measurement errors are…

training materials

A guide to data cleaning using Stata

In order to provide a comprehensive view of the multiple stages involved in a rigorous data cleaning process, this manual is divided into four chapters. Chapter 1 starts by listing the terms and definitions which the user is expected to be familiar…

working paper

Performance and adoption factors for open pollinated and hybrid maize varieties: Evidence from farmers’ fields in northern Ghana

Maize is the most widely grown starch in Ghana, and yet domestic supply does not meet demand, because maize productivity is low. Trials were performed in northern Ghana in 2015 to determine whether hybrid varieties would outperform the varieties…

journal article

Allocating external financing for health: a discrete choice experiment of stakeholder preferences

Most donors of external financing for health use allocation policies to determine which countries are eligible to receive financial support and how much support each should receive. Currently, most of these policies place a great deal of weight on…