On the evaluation of social innovations and social enterprises: Recognizing and integrating two solitudes in the empirical knowledge base.

Social innovation (SI) is billed as a new way to address complex social problems. Interest in SI has intensified rapidly in the last decade, making it an important area of practice for evaluators, but a difficult one to navigate. Learning from developments in SI and evaluation approaches applied in SI contexts is challenging because of 'fuzzy' concepts and silos of activity and knowledge within SI communities. This study presents findings from a systematic review and integration of 41 empirical studies on evaluation in SI contexts. We identify two isolated conversations: one about 'social enterprises' (SEs) and the other about non-SE 'social innovations'. These conversations diverge in key areas, including engagement with evaluation scholarship, and in the reported purposes, approaches and use of evaluation. We identified striking differences with respect to degree of interest in collaborative approaches and facilitation of evaluation use. The findings speak to trends and debates in our field, for example how evaluation might reconcile divergent information needs in multilevel, cross-sectoral collaborations and respond to fluidity and change in innovative settings. Implications for practitioners and commissioners of evaluation include how evaluation is used in different contexts and the voice of evaluators (and the evaluation profession) in these conversations.