Agglomerations of agricultural activity yield a number of institutional and infrastructural benefits for farmers. However, these regional concentrations also increase competition among farmers. We quantify to what extent competitive pressure affects farmers’ behaviour in agro-clusters, by analysing a survey of 1,250 farmers in West Java. We use a conceptual model based on the theory of planned behaviour and a behavioural interaction model. We also propose and econometrically test several hypotheses. We find that specific competitive environments for certain aspects of agricultural production matter most. In high-density agglomerations, less peer pressure appears to foster more cooperative behaviour. Food insecurity increases self-interest, and more intense cooperation is associated with lower income and appears to be regionally heterogeneous. Policies intended to facilitate cooperation could therefore be tailored to specific aspects of agricultural production and specific regions of interest.

农业活动的聚集为农民带来了许多制度和基础设施的好处。然而，这些区域集中也加剧了农民之间的竞争。通过分析对西爪哇 1,250 名农民的调查，我们量化了竞争压力对农业集群中农民行为的影响程度。我们使用基于计划行为理论的概念模型和行为交互模型。我们还提出并通过计量经济学检验了几个假设。我们发现农业生产某些方面的特定竞争环境最重要。在高密度的集聚区，较少的同伴压力似乎会促进更多的合作行为。粮食不安全会增加自身利益，而更紧密的合作与较低的收入有关，而且似乎存在地区差异。