Solving Empirical Bioeconomic Models: A Rangeland Management Application
为加州硬木牧场上的私人牧场开发了一个实证生物经济模型，涵盖薪柴、牛和狩猎活动，通过非线性最优控制求解橡树密度和牛存栏量的最优路径，并发现商业狩猎是主要经济价值，考虑随机性后生产从牛转向风险更低的薪柴和狩猎。
Abstract An empirical bioeconomic model was developed for private ranches conducting firewood, cattle, and hunting enterprises on California's hardwood rangelands. Hunting, forage, cattle, and oak firewood production functions were derived. Nonlinear optimal control was used to solve for two state and four control variables to give optimal time pathways for oak density and cattle stocking. Risk was considered through use of chance constraints, rainfall variability, and price expectations. Commercial hunting is shown to be the dominant economic value on these rangelands. Inclusion of stochastics shifts production away from cattle to less risky firewood and hunting enterprises.