This paper discusses a range of approaches and benchmarks that can guide future design of value chain impact evaluations. Twenty studies were reviewed to understand the status and direction of value chain impact evaluations. A majority of the studies focus on evaluating the impact of only a few interventions, at several levels within the value chains. Few impact evaluations are based on well-constructed, well-conceived comparison groups. Most of them rely on use of propensity score matching to construct counterfactual groups and estimate treatment effects.
Les populations africaines font partie des plus vulnérables face au changement climatique, du fait de leurs situations géographiques et économiques. Dans certaines régions du continent, où la variabilité climatique actuelle limite déjà la production agricole, le changement climatique pourrait l’inhiber complètement en l’absence de mesures pour adapter les systèmes agraires existants aux nouveaux contextes. Les paysans, qui représentent 70 à 80 % des agriculteurs en Afrique, seront très certainement les plus vulnérables face au changement climatique.
The frequency of natural disasters, especially storms and floods, has been increasing globally over the last several decades. Developing countries are especially vulnerable to such disasters but are often the least capable of coping with the associated impacts because of their limited adaptive capacity. Despite the increased interest in strengthening institutional capacity, it remains a challenge for many developing countries. Institutional capacity for disaster management and risk reduction can be built through various mechanisms.