Deliberative preferences for collective adaptation: evidence from the Philippines and Viet Nam
研究菲律宾和越南农民对海水入侵集体适应的商议偏好，发现制度嵌入性受物理暴露和社会经济能力影响，信息获取在信任度高时增强集体偏好，合法性显著促进集体措施支持。
Abstract This study examines how meso-level institutions within Ostrom’s polycentric governance systems guide farmers’ deliberative preferences for collective adaptation to saltwater inundation in the Philippines and Viet Nam. Specifically, the paper investigates three mechanisms of meso-institutional influence: legitimacy creation, belief formation, and social enforcement that shape farmers’ collective adaptation. Using multinomial logistic regression with cluster-robust standard errors on survey data from rice farmers, results show that institutional embeddedness depends on both physical exposure and socioeconomic capacity; information access enhances belief accuracy and collective preferences in contexts where institutional trust is high; and legitimacy-based feasibility significantly strengthens support for collective measures. Findings also show country differences in managing high-externality adaptation measures, with only Viet Nam exhibiting sensitivity to institutional quality at higher externality levels. Comparative results reveal that autonomous, participatory meso-institutions in the Philippines generate stronger deliberative preferences and more cohesive collective adaptation than state-centred structures in Viet Nam.