the next generation greater opportunities to break the remaining shackles of under-development (AfricaRice, 2011). Africa's rice sector faces a large number of biophysical and socioeconomic constraints. These generally translate into low productivity of rice produced in Africa. Research areas to address these are numerous and need to be prioritized because resources are scarce-basic economics and general knowledge recognize that this scarcity of resources causes many needs to remain unsatisfied. Ex-ante assessment of the impact of rice research in Africa is important to: (i) adequately identify priority research themes and target populations; (ii) efficiently allocate scarce resources to priority research themes; (iii) better target research outputs to where they will have the maximum impact; (iv) enhance research relevance and positive impact on the livelihoods and well-being of the target population; and (v) enhance the efficiency of public research organizations (Diagne et al., 2009). Several assessments have been made of the potential benefit of rice research in Africa. Many of these were conducted by the Africa Rice Center (AfricaRice), one of the 15 members of the CGIAR Consortium and an association of