Biosecurity and Infectious Animal Disease
研究农业生产中两种生物安全风险（疾病扩散与疾病传入）下，农户防护行为的空间互动，发现扩散风险下农户努力相互替代，而传入风险下努力互补，空间结构影响均衡结果。
The spatial dimension of agricultural production is important when a communicable disease enters a region. This paper considers two sorts of biosecurity risk that producers can seek to protect against. One concerns the risk of spread: that neighboring producers do not take due care in protecting against being infected by a disease already in the region. In this case, producer efforts substitute with those of near neighbors. For representative spatial production structures, we characterize Nash equilibrium protection levels and show how spatial production structure matters. The other sort of risk concerns entry: that producers do not take due care in preventing the disease from entering the region. In this case, producer heterogeneity has subtle effects on welfare loss due to strategic behavior. Efforts by producers complement, suggesting that inter-farm communication will help to redress the problem.