In this brief, we summarize studies on five types of value chain interventions that were supported by the CGIAR’s Research Program on Policies, Institutions, and Markets (PIM) through its Flagship 3 on Inclusive and Effective Value Chains. Figure 1 illustrates a “typical” agricultural value chain, including the five intervention types (in orange). These include interventions that attempt to deal with multiple production constraints; certification; contract farming; public-private partnerships; and “other” services related to trading and marketing agricultural products. Apart from the last category, these interventions all involve production. This reflects the fact that smallholder producers can be considered, in some ways, the weakest link in evolving agricultural value chains (de Brauw and Bulte 2021). Hence, it is sensible to target interventions either at or close to smallholders. However, in some cases, the best way to overcome smallholder constraints may be to help actors at other points in the value chain overcome constraints. Many interventions share a focus on reducing transaction costs to promote smallholder market integration. Ideally, interventions increase both efficiency and inclusion, but we observe that such win-win outcomes are rare. Trade-offs appear to be more common than synergies, and some value chain interventions involve clear winners and losers.