The economics of cluster farming for sustainable smallholder commercialization in Ethiopia: institutional drivers, trade-offs—evidence from a systematic review

Résumé

Inroduction Smallholder commercialization remains central to agricultural transformation in developing countries, yet fragmented production systems, high transaction costs, and weak institutional capacity continue to constrain market participation and rural welfare. In Ethiopia, Cluster Farming (CF) has emerged as a flagship policy intervention designed to address these challenges through collective production, coordinated input use, and joint marketing. However, evidence on its economic performance remains fragmented and heterogeneous. Methods This study systematically reviews the economics of cluster farming in Ethiopia following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A total of 41 empirical studies were synthesized using an evidence-weighting approach that differentiates studies according to methodological rigor. The review integrates theories of agglomeration economies, Transaction Cost Economics, Institutional Analysis and Development, and smallholder commercialization to explain the mechanisms underlying cluster farming outcomes. Results The evidence indicates that cluster farming is generally associated with improvements in technical efficiency, productivity, commercialization, technology adoption, and household welfare. Studies applying stronger causal identification strategies consistently report higher marketed surplus, improved asset accumulation, and greater market participation among cluster participants, while efficiency analyses document substantial gains in technical and allocative efficiency. However, these benefits are highly context dependent, with coordination costs arising from collective decision-making, weak local governance, information asymmetries, and unequal benefit distribution constraining the realization of economies of scale. Discussion Institutional quality, farmer resource endowments, commodity characteristics, market access, and regional implementation capacity explain the heterogeneous performance of cluster farming across Ethiopia. This review contributes to the literature by proposing an integrated framework that conceptualizes cluster farming as an institutional coordination mechanism through which economies of scale can be translated into sustainable commercialization when supported by effective governance and robust local institutions. The findings suggest that policies should move beyond spatial clustering alone and prioritize institutional capacity building, transparent governance, stronger market linkages, and context-specific implementation strategies to enhance the long-term sustainability of smallholder commercialization and rural welfare.

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