Listar Documentos de Trabajo e Informes Técnicos por autor "Da Rocha, José María"
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Economic Effects of Global Warming under Stock Growth Uncertainty: The European Sardine Fishery
Da Rocha, José María; Gutiérrez Huerta, María José; Villasante, Sebastián (University of the Basque Country, Department of Foundations of Economic Analysis II, 2013)Global warming of the oceans is expected to alter the environmental conditions that determine the growth of a fishery resource. Most climate change studies are based on models and scenarios that focus on economic growth, ... -
Endogenous fisheries management in a stochastic model: Why do fishery agencies use TAC
Da Rocha, José María; Gutiérrez Huerta, María José (University of the Basque Country, Department of Foundations of Economic Analysis II, 2010-12)The aim of this paper is to explain under which circumstances using TACs as instrument to manage a fishery along with fishing periods may be interesting from a regulatory point of view. In order to do this, the deterministic ... -
Lessons from the northern hake long-term management plan: Could the economic assessment have accepted it?
Da Rocha, José María; Gutiérrez Huerta, María José (University of the Basque Country, Department of Foundations of Economic Analysis II, 2011-01)An economic expert working group (STECF/SGBRE-07-05) was convened in 2007 for evaluating the potential economic consequences of a Long-Term Management Plan for the northern hake. Analyzing all the scenarios proposed by ... -
On the Benefits of Including Age-structure in Harvest Control Rules
Da Rocha, José María; Mato Amboage, Rosa (2014-08-27)This paper explores the benefits of including age-structure in the control rule (HCR) when decision makers regard their (age-structured) models as approximations. We find that introducing age structure into the HCR reduces ... -
Pulse vs. Optimal Stationary Fishing: The Northern Stock of Hake
Da Rocha, José María; Gutiérrez Huerta, María José; Taboada Antelo, Luis (University of the Basque Country, Department of Foundations of Economic Analysis II, 2011-11)Pulse fishing may be a global optimal strategy in multicohort fisheries. In this article we compare the pulse fishing solutions obtained by using global numerical methods with the analytical stationary optimal solution. ... -
Reconciling yield stability with international fisheries agencies precautionary preferences: the role of non constant discount factors in age structured models
Da Rocha, José María; García-Cutrín, Javier; Gutiérrez Huerta, María José; Touza, Julia (2015)International fisheries agencies recommend exploitation paths that satisfy two features. First, for precautionary reasons exploitation paths should avoid high fishing mortality in those fisheries where the biomass is ... -
Reference Points and Optimal Management in Stochastic Age-Structured Fisheries Models
Da Rocha, José María; Gutiérrez Huerta, María José (University of the Basque Country, Department of Foundations of Economic Analysis II, 2009-07)The purpose of this article is to characterize dynamic optimal harvesting trajectories that maximize discounted utility assuming an age-structured population model, in the same line as Tahvonen (2009). The main novelty of ... -
Reference Points Based on Dynamic Optimisation: A Versatil Algorithm for Mixed Fishery Management with Bio-economic Agestructured Models
Da Rocha, José María; Gutiérrez Huerta, María José; Cerviño, Santiago (University of the Basque Country, Department of Foundations of Economic Analysis II, 2012)Single-species management objectives may not be consistent within mixed fisheries. They may lead species to unsafe situations, promote discarding of over-quota and/or misreporting of catches. We provide an algorithm for ... -
Selectivity, pulse fishing and endogenous lifespan in Beverton-Holt models
Da Rocha, José María; Gutiérrez Huerta, María José; Antelo, Luis T. (University of the Basque Country, Department of Foundations of Economic Analysis II, 2012)Optimal management in a multi-cohort Beverton-Holt model with any number of age classes and imperfect selectivity is equivalent to finding the optimal fish lifespan by chosen fallow cycles. Optimal policy differs in two ... -
The Evaluation of Fisheries Management: A Dynamic Stochastic Approach
Gutiérrez Huerta, María José; Da Rocha, José María (University of the Basque Country, Department of Foundations of Economic Analysis II, 2003-03)In this article, we analyze how to evaluate fishery resource management under “ecological uncertainty”. In this context, an efficient policy consists of applying a different exploitation rule depending on the state of the ... -
The Optimality of the Common Fisheries Policy: the Northern Stock of Hake
Gutiérrez Huerta, María José; Da Rocha, José María (University of the Basque Country, Department of Foundations of Economic Analysis II, 2002)We evaluate the management of the Northern Stock of Hake during 1986-2001. A stochastic bioeconomic model is calibrated to match the main features of this fishing ground. We show how catches, biomass stock and profits ... -
Why Economists Reject Long-Term Fisheries Management Plans?
Da Rocha, José María; Gutiérrez Huerta, María José (University of the Basque Country, Department of Foundations of Economic Analysis II, 2009-08)Most fisheries agencies conduct biological and economic assessments independently. This independent conduct may lead to situations in which economists reject management plans proposed by biologists. The objective of this ...