2019 World Conference on Natural Resource Modelling
HEC Montréal, Canada, 22 — 24 May 2019
2019 World Conference on Natural Resource Modelling
HEC Montréal, Canada, 22 — 24 May 2019
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Nominees for Best Ph.D. Student Presentation 2
May 22, 2019 02:00 PM – 04:00 PM
Location: Hélène-Desmarais
Chaired by Frank Van Langevelde
4 Presentations
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02:00 PM - 02:30 PM
Information structures and environmental agreements
We consider international agreements for the protection of the environment where the signatories agree to cooperate in order to determine the level of their joint emissions. In a stylized model, we evaluate the impact of two information structures on the stability of an International Environmental Agreement (IEA) over time. We, first, analyze the impact of signatories’ leadership on the steady-state pollution stock and the corresponding size of the internally and externally stable coalition. We, then, consider the impact of taking into consideration the pollution stock dynamics and the evolution of the coalition size by all players in the decision making process as well as in the corresponding steady-state values.
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02:30 PM - 03:00 PM
Self enforcing environmental agreements, taxes and delayed information in a continuous time Fish Wars model
In this paper, we analyse a continuous time version of Fish Wars with the infinite time horizon and state-dependent constraints on controls. We calculate the social optimum and a Nash equilibrium which always leads to the depletion of the resource even if the social optimum results in the sustainability. We propose two ways of solving the problems of enforcing optimality: either by a tax-subsidy system or by an environmental agreement even if we assume that it takes time to detect any defection of a player. We also propose a general algorithm of finding financial incentives enforcing the optimal profile in a large class of differential games.
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03:00 PM - 03:30 PM
Ecosystem dynamics and fishing management scenarios for the coastal fishery in French Guiana
We apply an ecosystem-based fishery management approach on the small-scale fishery of French Guiana. To achieve this, we rely on a multi-species, multi-fleet model inspired by Ecosim. The model is calibrated using data (provided by IFREMER) of fishing landings and efforts from 2006 to 2017 for 13 species and 4 fleets. The calibration exhibits the importance of illegal fishing (Suriman, Brazil) in the ecosystem dynamic. From the calibrated model, we contrast different fishing management scenarios at the horizon 2050 including a status quo scenario and closure scenario.
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03:30 PM - 04:00 PM
Recycling under environmental, climate and resource constraints
We study the recycling opportunity of an industrial sector constrained by climate, resource and waste capacities. A final good is produced from virgin and recycled materials, and its consumption releases waste and GHG emissions. We identify the optimal trajectories of resources use, mainly depending on the emission rates of each resource and by the relative scarcity of their stocks. Recycling is sometimes an opportunity to reduce the impact of consumption on primary resources and waste but can still affect the environment. Last, we show that the emissions ceiling and recovery rates are complementary to improve the environmental efficiency.