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Land use dynamics and the environment

机译:土地利用动态与环境

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This paper builds a benchmark framework to study optimal land use, encompassing land use activities and environmental degradation. We focus on the spatial externalities of land use as drivers of spatial patterns: land is immobile by nature, but local actions affect the whole space since pollution flows across locations resulting in both local and global damages. We prove that the decision maker problem has a solution, and characterize the corresponding social optimum trajectories by means of the Pontryagin conditions. We also show that the existence and uniqueness of time-invariant solutions are not in general guaranteed. Finally, a global dynamic algorithm is proposed in order to illustrate the spatial-dynamic richness of the model. We find that our simple set-up already reproduces a great variety of spatial patterns related to the interaction between land use activities and the environment. In particular, abatement technology turns out to play a central role as pollution stabilizer, allowing the economy to reach a time-invariant equilibrium that can be spatially heterogeneous. (C) 2014 Elsevier B.V. All rights reserved.
机译:本文建立了一个基准框架来研究最佳土地利用,包括土地利用活动和环境退化。我们关注土地利用的空间外部性,这是空间格局的驱动因素:土地本质上是固定的,但由于污染会流经各地,导致局部和全球性破坏,因此局部行动会影响整个空间。我们证明了决策者问题具有解决方案,并通过庞特里亚金条件表征了相应的社会最优轨迹。我们还表明,通常不能保证时不变解的存在性和唯一性。最后,提出了一种全局动态算法来说明模型的空间动态丰富性。我们发现,我们的简单设置已经复制了与土地使用活动和环境之间的相互作用相关的多种空间模式。尤其是,减排技术作为污染稳定剂发挥了核心作用,从而使经济达到了时不变的平衡,这种平衡在空间上是异构的。 (C)2014 Elsevier B.V.保留所有权利。

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