Smallholder production predominates inmany areas of primary food production in Indonesia. Yet,outside of oil palm and poultry, contract farming is rare asare other forms of collective action or verticalcoordination. Fragmented production and market interfacesgive rise to high transaction costs and problems in matchingsupply with downstream or consumer requirements. Yet, thereis a growing body of international experience promotingmultiple models to help realize some economies of scalewithin smallholder-based production systems and effectivelyaddressing the aggregation and market-matching problems.These include different forms of joint farming operations,shared services, farmer organizations, contractingarrangements or partnerships with agro-enterprises, andother models. Their suitability and need for public enablingsupport varies depending upon the underlying circumstances.This note synthesizes experiences, lessons learned, andsuccess factors with potential relevance for Indonesianstaple food crop and horticultural production.