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Measuring the bioeconomic impacts of prolonged drought on a lake ecosystem: The case of the Great Salt Lake, Utah
Natural Resource Modeling ( IF 1.8 ) Pub Date : 2019-12-10 , DOI: 10.1111/nrm.12251
Arthur J. Caplan 1 , Dong‐Hun Go 2
Affiliation  

We present a general‐equilibrium (GE) bioeconomic model of Utah's Great Salt Lake (GSL) ecosystem that tightly links the lake's ecosystem with its regional economy and attendant international trading partners, thereby enabling full identification of dynamic feedback effects in the presence of prolonged drought. The drought modeled here mimics a drying climate's impact on the lake's nutrient pool. We demonstrate how prolonged drought affects key bioeconomic variables over time, and how the GSL bioeconomy recovers toward a new steady state. We also consider how two separate fishery‐specific regulatory tools—a temporary harvest moratorium and ad valorum tax on the fishery's factors of production—alter the bioeconomy's recovery path. Our main finding is that a fishery‐specific regulation can induce perverse social‐welfare effects in a GE context by inducing a shift of resources out of the fishery and into a sector of the economy that produces a negative externality, in our case pollution from the mining industry. These welfare effects are appraised with two different measures of equivalent variation—one based on an initial benchmark period and the other on expenditure differences that roll through time. Our model further demonstrates how these perverse‐welfare effects can be mitigated by imposing either an output or input tax on the mining industry.

中文翻译:

衡量长期干旱对湖泊生态系统的生物经济影响:以犹他州大盐湖为例

我们提出了犹他州大盐湖(GSL)生态系统的一般均衡(GE)生物经济模型,该模型将湖的生态系统与其区域经济和相关的国际贸易伙伴紧密联系在一起,从而能够在长期干旱的情况下全面识别动态反馈效应。这里模拟的干旱模拟了干旱气候对湖泊养分池的影响。我们证明了长期干旱如何随时间影响关键的生物经济变量,以及GSL生物经济如何恢复到新的稳定状态。我们还考虑了两种单独的针对渔业的监管工具,即暂停捕捞和对渔业生产要素征收从价税,如何改变生物经济的恢复路径。我们的主要发现是,在GE的背景下,特定于渔业的法规可以通过诱使资源从渔业转移到产生负外部性的经济部门中,从而导致有害的社会福利效应,在我们的案例中是由污染造成的采矿业。这些福利影响通过两种不同的等价变动评估方法进行评估-一种基于初始基准期间,另一种基于随时间变化的支出差异。我们的模型进一步证明了如何通过对采矿业征收销项税或进项税来减轻这些不利的福利影响。这些福利影响通过两种不同的等价变异评估方法进行评估-一种基于初始基准期间,另一种基于随时间变化的支出差异。我们的模型进一步证明了如何通过对采矿业征收销项税或进项税来减轻这些不利的福利影响。这些福利影响通过两种不同的等价变异评估方法进行评估-一种基于初始基准期间,另一种基于随时间变化的支出差异。我们的模型进一步证明了如何通过对采矿业征收销项税或进项税来减轻这些不利的福利影响。
更新日期:2019-12-10
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