It is widely argued that the development projects that are most transformational are often the least measurable. Progress, or otherwise, in empowerment, rights and social justice cannot easily be turned into neat, numerical graphs. Yet the pressure to be accountable is increasing all the time. In his blog, “How Do You Measure the Difficult Stuff (Empowerment, Resilience) and Whether Any Change is Attributable to Your Role?", Duncan Green, strategic advisor for Oxfam, explores the complexity and measurement of development interventions.