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Time Scale Externalities and the Management of Renewable Resources

Giannis Vardas () and Anastasios Xepapadeas ()

No 2015.27, Working Papers from Fondazione Eni Enrico Mattei

Abstract: The evolution of renewable resources is characterized in many cases by different time scales where some state variables such as biomass, may evolve relatively faster than other state variables such as carrying capacity. Ignoring this time scale separation means that a slowly changing variable is treated as constant over time. Management rules designed without accounting for time scale separation will result in inefficiencies in resource management. We call this inefficiency time scale externality and we analyze renewable resource harvesting when carrying capacity evolves slowly, either in response to exogenous forcing or in response to emissions generated by the industrial sector of the economy. We study cooperative and non-cooperative solutions under time scale separation. Using singular perturbation reduction methods (Fenichel 1979), we examine the role of different time scales in environmental management and the potential errors in optimal regulation when time scale separation is ignored.

Keywords: Optimal Resource Harvesting; Fast Slow Dynamics; Singular Perturbation; Regulation; Open Loop; Closed Loop (search for similar items in EconPapers)
JEL-codes: D81 Q20 (search for similar items in EconPapers)
New Economics Papers: this item is included in nep-env, nep-reg and nep-res
Date: 2015-03
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