Neighbourhood Effects in Pesticide Use: Evidence from the Rural Philippines
利用菲律宾保和省的地块面板数据，通过空间面板计量模型发现，农民农药使用存在空间相关性，尤其是除草剂，且这种相关性源于模仿邻居行为而非对虫害的直接响应。
Abstract This study investigates how pesticide use by neighbouring farmers affects a given farmer's pesticide use. Although it is common knowledge that pesticide use has spatial externalities, few empirical economic studies explicitly analyse this issue. Applying a spatial panel econometric model to plot‐level panel data for Bohol, Philippines, this study shows that pesticide use, especially for herbicides, is spatially correlated, although there is no statistically significant spatial correlation in unobserved shocks. This implies that farmers apply pesticides by referring to the behaviour of neighbouring farmers rather than responding directly to the intensity of their own infestation.