"Business support interventions in low and middle-income countries (LMICs) direct a large amount of resources to SMEs, with the assumption that institutional constraints impede small and medium-sized enterprises (SMEs) from generating profits and employment at the firm level, which in turn is thought to impede economic growth and poverty reduction. Yet despite this abundance of resources, very little is known about the impact of such interventions. To address this gap, this systematic review analyses evaluations of SME support services in LMICs to help inform policy debates pertaining to SMEs and business support services. This review examines the available evidence on the effects of SME support services in LMICs on firm-level performance indicators (such as revenues, profits, and productivity), employment generation, and labour productivity."