However, as they focus on local as opposed to global causation factors (Deaton and Banerjee, 2012) they may lack external validity at larger scales and in other contexts (Pritchett and Sandefur, 2013). Such methodologies, for instance, allow for a characterisation of contextual effects in enhancing or supressing the effectiveness of an intervention, e.g. the influence that national programmes or policies such as feed-in tariffs have on an intervention’s ability to mobilise private capital (Cardenas et al., Such methods may be better suited to assessing the effectiveness of policies and measures.