摘要: Micro, small and medium private and social enterprises are emerging as important players in the water, sanitation and hygiene sector. This paper provides a systematic review of literature on this topic. It assesses the current evidence base in three areas: factors affecting success of enterprise engagement; outcomes for the poor as a result of enterprise engagement; and lastly how civil society organisations are engaging to support enterprise development. The review revealed significant variation in the level of rigour of available evidence on this topic, and reflected limited availability of highly rigourous studies. Across the literature, similar success factors were reported across the water and sanitation sub-sectors. These included constraints to business viability due to limitations in demand, lack of business and technical skills and financial challenges (for example access to credit). Policy, governance and institutional …