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首页> 外文期刊>Environmental & Resource Economics >Renewable Resource Harvesting Under Correlated Biological and Economic Uncertainties: Implications for Optimal and Second-Best Management
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Renewable Resource Harvesting Under Correlated Biological and Economic Uncertainties: Implications for Optimal and Second-Best Management

机译：相关的生物学和经济不确定性下的可再生资源收获：对最佳管理和第二最佳管理的启示

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摘要

Biologists have long recognized environmental disturbances impact both the growth of renewable resources and the efficiency of harvest effort. However, models of renewable resource management under uncertainty have commonly assumed economic and biological uncertainties to be uncorrelated. We present examples of valuable fish species that experience correlated variation in biological growth and catchability, in response to a common environmental disturbance. Building correlation into a model of renewable resource management under uncertainty, we find correlation to alter the optimal response by managers to cost disturbances, and impact the value of retaining intra-period flexibility over harvest targets. Examining the performance of three harvest control mechanisms-harvest quotas, effort quotas, and taxes-reveals that positive correlation between costs and growth favors harvest quotas over effort quotas, and effort quotas over taxes (and vice versa). The model is then applied numerically to the Pacific bigeye tuna fishery, which experiences positively correlated shocks driven by the El Nino Southern Oscillation. Correlation qualitatively changes the optimal response to a cost shock, and harvest quotas are found to be strongly favored over both effort quotas and taxes.
机译：生物学家早就认识到环境干扰会影响可再生资源的增长和收割工作的效率。但是，不确定性下的可再生资源管理模型通常假定经济和生物不确定性是不相关的。我们提供了一些宝贵的鱼类实例，这些鱼类在应对常见的环境干扰后会经历相关的生物生长和可捕获性变化。将相关性构建到不确定性下的可再生资源管理模型中，我们发现相关性可以改变管理者对成本干扰的最佳响应，并影响保留期内灵活性超过收获目标的价值。检查三种收获控制机制的绩效-收获配额，工作量配额和税收-揭示成本与增长之间的正相关关系有利于收获配额胜过工作配额，而工作配额胜过税收（反之亦然）。该模型随后在数值上应用于太平洋大眼金枪鱼渔业，该地区经历了厄尔尼诺南方涛动驱动的正相关冲击。相关性从质上改变了对成本冲击的最佳响应，并且发现收获配额比努力配额和税收都更受青睐。

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