"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."

"Large amounts of funding are going towards programmes to support small and medium enterprises (SMEs) in low- and middle-income countries in order to increase revenue and profits, generate employment, and, so, create economic growth and reduce poverty. The Campbell review summarizes evidence of the impact of these programmes on measures of SME performance including revenues, profits, and productivity, as well as the firms’ ability to generate employment and increase their labour productivity Included studies examine interventions targeted at SMEs (up to 250 employees) involving tax simplification, exports and access to external markets; support for innovation policies; support to local production systems; training and technical assistance, and SME financing and credit guarantee programmes. Findings from 40 studies are summarised in the review. These studies present evidence from 18 low- and middle-income countries, with 26 studies analysing programmes in Latin America, six from Asia and five from Africa."