Avoiding the counterfactuals: Research design in assesing the impact of agricultural research
Two things strike the eye in the literature and debate on the impact of agricultural research. Firstly, it is not unsurprisingly dominated by economists using cost-benefit analysis. Secondly and more surprisingly, much space is devoted to the discussion of counterfactuals, i.e. by an argument of the type: “If this research had not been made, yield development (or whatever indicator) would have bee