Location choice for renewable resource extraction with multiple non-cooperative extractors: a spatial Nash equilibrium model and numerical implementation
Erik O. Sterner (),
Elizabeth Robinson and
Heidi Albers ()
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Erik O. Sterner: Chalmers University of Technology
Letters in Spatial and Resource Sciences, 2018, vol. 11, issue 3, 315-331
Abstract Especially in lower-income countries, the distribution of renewable resources in open access settings often reflects the non-cooperative spatial extraction decisions of many individuals who spread out across a landscape. These individuals recognize tradeoffs between distance to the resource, density, and competition amongst extractors. In this paper we present a game theoretic model that explicitly accommodates such explicitly spatial non-cooperative behavior with respect to the extraction of a stationary renewable natural resource, such as a non-timber forest products or bivalvia (for example, oysters, clams), that is located in a two dimensional landscape. Villagers that have identical labor allocations and preferences are shown to undertake very different extraction pathways in equilibrium. For example, some may extract in more congested patches closer to the village while others may extract in less crowded but more distant patches. For many parameterizations, we find multiple spatial Nash equilibria that differ with respect to the number of villagers at each resource location, whether individual villagers extract from one or multiple locations, and the extent and spatial pattern of resource degradation. In addition to finding equilibria with widely different actions taken by identical extractors, the analysis here demonstrates the impact of simplifying assumptions for spatial decisions on predictions of policy impact, resource distributions, and conflict.
Keywords: Natural resource extraction; Spatial equilibrium; Optimal pathways; Resource patterns; Spatial game; Non-timber forest products (search for similar items in EconPapers)
JEL-codes: C63 C72 O13 Q56 Q57 Q22 Q23 (search for similar items in EconPapers)
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