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Comportement de pêche et gestion : l’exemple de la pêcherie pélagique du Golfe de Gascogne ArchiMer
Vermard, Youen.
In the current context of fisheries management, simulation models are required to support the evaluation of management scenarios. These models should include the key processes of the fishery system: stock dynamics, fleet dynamics, manager decision-making, and the interactions between these three elements. Most of the existing models have concentrated on the modeling of biological processes, population dynamics, and ecosystem interactions. However, a number of fisheries management failures could have resulted from a misunderstanding of fishers behavior rather than from limited knowledge of the status of fishery resources. It has for example been showed that in an exploited system, fishers’ spatial behavior influences the predicted outcomes of management...
Tipo: Text Palavras-chave: Dynamique de flottille; RUM; VMS; Évaluation de mesures de gestion; Fleet dynamics; Random Utility Model; VMS; Management strategy evaluation.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00001/11256/7799.pdf
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HOW DO PUBLIC INSTITUTIONS SELECT COMPETITIVE AGRICULTURAL R&D PROJECTS? - THE CASE OF AN ITALIAN REGION AgEcon
Materia, Valentina Cristiana; Esposti, Roberto.
This paper analyses, through a Random Utility Model (RUM), how a public institution selects among competitive agricultural R&D projects on the basis of observable distinctive features. In particular, we aim at verifying if, which and how other criteria, beyond the pure scientific value, are decisive for selection. From such information, like cost, duration, etc., the institution must infer about the unobservable actual ability, effort and reliability of the scientists themselves. Such analytical framework is empirically applied to a real case, the agricultural R&D activity funded by the Emilia-Romagna Region (Italy) between 2001 and 2006.
Tipo: Conference Paper or Presentation Palavras-chave: Public Agricultural R&D Funding; Random Utility Model; Logit Model; Agribusiness; Community/Rural/Urban Development; Public Economics.
Ano: 2009 URL: http://purl.umn.edu/57642
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Predicting fisher response to competition for space and resources in a mixed demersal fishery ArchiMer
Girardin, Raphael; Vermard, Youen; Thebaud, Olivier; Tidd, Alex; Marchal, Paul.
Understanding and modelling fleet dynamics and their response to spatial constraints is a prerequisite to anticipating the performance of marine ecosystem management plans. A major challenge for fisheries managers is to be able to anticipate how fishing effort is re-allocated following any permanent or seasonal closure of fishing grounds, given the competition for space with other active maritime sectors. In this study, a Random Utility Model (RUM) was applied to determine how fishing effort is allocated spatially and temporally by the French demersal mixed fleet fishing in the Eastern English Channel. The explanatory variables chosen were past effort i.e. experience or habit, previous catch to represent previous success, % of area occupied by spatial...
Tipo: Text Palavras-chave: Effort allocation; Random Utility Model; Spatial competition; Demersal mixed fishery; Eastern English Channel; Spatial management.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00250/36153/37312.pdf
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The relative weight of traditions, economics, and catch plans in New Zealand fleet dynamics ArchiMer
Marchal, Paul; Lallemand, Philippe; Stokes, Kevin.
We investigate the relative weights of catch plans expected profit, and traditions in fishers' decision-making For five New Zealand fleets subject to an individual transferable quota (ITQ) management regime. Metiers were defined for these fleets as a combination of bears. management units, and a targeting index (either target species or statistical area) A nested logit random utility model was Used to model the metier allocation of fishing, effort in relation to catch plans, expected profit, and Past fishing allocations. This study showed that traditions and catch plans appeared to be important determinants of fishers' behavior for these New Zealand fleets. The model developed in thiS study filled the data generally well and was also able to predict, in...
Tipo: Text Palavras-chave: Random Utility Model; New Zealand fisheries; Fleet dynamics; Catch plans; Individual Transferable Quotas.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6418.pdf
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The Welfare Effects of Restricting Off-Highway Vehicle Access to Public Lands AgEcon
Jakus, Paul M.; Keith, John E.; Liu, Lu; Blahna, Dale.
Off highway vehicle (OHV) use is a rapidly growing outdoor activity that results in a host of environmental and management problems. Federal agencies have been directed to develop travel management plans to improve recreation experiences, reduce social conflicts and diminish environmental impacts of OHVs. We examine the effect of land access restrictions on the welfare of OHV enthusiasts in Utah using Murdock’s (2006) unobserved heterogeneity random utility model. Our models indicate that changing access to public lands from fully “open” to “limited” results in relatively small welfare losses, but that prohibiting access results in much larger welfare losses.
Tipo: Conference Paper or Presentation Palavras-chave: Off-highway Vehicles; Recreational Access; Unobserved Heterogeneity; Random Utility Model; Environmental Economics and Policy; Land Economics/Use.
Ano: 2010 URL: http://purl.umn.edu/61152
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