Dynamic Use of Closures and Imperfectly Enforced Quotas in a Metapopulation
构建了一个捕捞集合种群的生物经济模型，分析在配额执行不完善时，临时或永久关闭区域作为次优政策如何平衡监测成本与减缓过度捕捞的动态收益，并通过数值解展示其动态调控路径的潜在优势。
The dynamic efficiency of closures in bioeconomic systems depends upon stock levels and in situ values that evolve over time, and on relative costs of implementation. A model of a harvested metapopulation is presented in which second‐best reduction of harvest from open‐access levels using input quotas balances monitoring costs against dynamic benefits of mitigating overharvesting. Temporary or permanent closures—though generally still second best—are preferable to quotas under certain conditions, as demonstrated for a representative patch and time period. Interactions between patches are discussed. Numerical solutions illustrate comparative dynamics of closure use, and show their potential benefits in a dynamic regulatory path.