SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Sanchirico, James N..

Marine reserves are gaining attention around the world as a tool to both conserve ocean resources and improve the productivity of fisheries. Using simulation analysis, we investigate in a limited-entry fishery comprising nine subpopulations the inherent bioeconomic trade-offs associated with cost-effective designs of marine reserve networks' that is, the trade-offs between the degree of connectedness of a site and the biological and economic heterogeneity. We find in many cases that closing two low-value patches can result in larger biological gains and lower costs than closing one high-value patch. We also simulate biological productivity effects after creation of a reserve and find that under special conditions, aggregate sustainable rents are maximized...

Asset Pricing in Created Markets for Fishing Quotas

Palavras-chave: Limited-entry; Marine reserve networks; Spatial management; Resource /Energy Economics and Policy; Q22.

Ano: 2003

URL: http://purl.umn.edu/10624

Newell, Richard G.; Papps, Kerry L.; Sanchirico, James N..

We investigate the applicability of the present-value asset pricing model to fishing quota markets by applying instrumental variable panel data estimation techniques to 15 years of market transactions from New Zealand's individual fishing quota market. In addition to the influence of current fishing rents (as measured by lease prices), we explore the effect of market interest rates, risk, and expected changes in future rents on quota asset prices. Controlling for these other factors, the results support a fairly simple relationship between quota asset and contemporaneous lease prices. Consistent with theoretical expectations, the results indicate that quota asset prices are positively related to declines in interest rates, lower levels of risk, expected...

Marine Protected Areas: Economic and Social Implications

Palavras-chave: Tradable permits; Individual transferable fishing quota; Asset pricing; Fisheries; Policy; Resource /Energy Economics and Policy; Q22; Q28; D40; L10.

Ano: 2005

URL: http://purl.umn.edu/10639

Sanchirico, James N.; Cochran, Kathryn A.; Emerson, Peter M..

This paper is a guide for citizens, scientists, resource managers, and policy makers, who are interested in understanding the economic and social value of marine protected areas (MPAs). We discuss the potential benefits and costs associated with MPAs as a means of illustrating the economic and social tradeoffs inherent in implementation decisions. In general, the effectiveness of a protected area depends on a complex set of interactions between biological, economic, and institutional factors. While MPAs might provide protection for critical habitats and cultural heritage sites and, in some cases, conserve biodiversity, as a tool to enhance fishery management their impact is less certain. The uncertainty stems from the fact that MPAs only treat the symptoms...

The Benefits and Costs of Alternative Policies for the Management of Pierce's Disease: A Case Study of the Blue-Green Sharpshooter in the Napa Valley

Palavras-chave: Marine protected areas; Marine reserves; Fisheries; Resource /Energy Economics and Policy; Q0; Q2.

Ano: 2002

URL: http://purl.umn.edu/10795

Fuller, Kate B.; Alston, Julian M.; Sanchirico, James N..

Replaced with revised version of poster on 07/23/10.

AJAE Appendix: Asset Pricing in Created Markets

Palavras-chave: Production Economics; Resource /Energy Economics and Policy.

Ano: 2010

URL: http://purl.umn.edu/61424

Newell, Richard G.; Papps, Kerry L.; Sanchirico, James N..

The material contained herein is supplementary to the article named in the title and published in the American Journal of Agricultural Economics, May 2007, Volume 89, Issue 2.

Tipo: Journal Article

Palavras-chave: Marketing.

Ano: 2007

URL: http://purl.umn.edu/7415

TROPHIC PORTFOLIOS IN MARINE FISHERIES: A STEP TOWARDS ECOSYSTEM MANAGEMENT

Sanchirico, James N.; Smith, Martin D..

Marine ecologists warn that humans are "fishing down marine food webs." To explore the economic implications of this phenomenon, this paper applies portfolio theory to aggregate fisheries data. It poses two definitions of a sustainable mean-variance catch frontier. It computes a mean-variance frontier for catch using UNFAO historical fisheries data. Finally, the paper discusses the historical trend in inefficiency.

Catch-Quota Balancing in Multispecies Individual Fishing Quotas

Palavras-chave: Environmental Economics and Policy; Resource /Energy Economics and Policy.

Ano: 2003

URL: http://purl.umn.edu/22191

Sanchirico, James N.; Holland, Daniel S.; Quigley, Kathryn; Fina, Mark.

Individual fishery quotas (IFQs) are an increasingly prevalent form of fishery management around the world, with more than 170 species currently managed with IFQs. Yet, because of the difficulties in matching quota holdings with catches, many argue that IFQs are not appropriate for multispecies fisheries. Using on-the-ground-experience with multispecies IFQ fisheries in Iceland, New Zealand, Australia, and Canada, we assess the design and use of catch-quota balancing mechanisms. Our methodology includes a mix of interviews with fishery managers, industry representatives, and brokers, literature review, and data analysis. We find that a combination of incentives and limits on use rates for the mechanisms provide sufficient flexibility to the quota owner...

Modeling Economywide versus Sectoral Climate Policies Using Combined Aggregate-Sectoral Models

Palavras-chave: Natural resources; Created markets; Tradable permits; Resource /Energy Economics and Policy; Q22; Q28; D40; L10.

Ano: 2005

URL: http://purl.umn.edu/10543

Pizer, William A.; Burtraw, Dallas; Harrington, Winston; Newell, Richard G.; Sanchirico, James N..

Economic analyses of climate change policies frequently focus on reductions of energy-related carbon dioxide emissions via market-based, economywide policies. The current course of environment and energy policy debate in the United States, however, suggests an alternative outcome: inefficiently designed and/or sector-based policies. This paper uses a collection of specialized, sector-based models in conjunction with a computable general equilibrium model of the economy to examine and compare these policies at an aggregate level. We examine the relative cost of different policies designed to achieve the same quantity of emissions reductions. We find that excluding a limited number of sectors from an economywide policy does not significantly raise costs....

Palavras-chave: Carbon; Carbon dioxide; Climate change; Climate policy; General equilibrium model; Partial equilibrium model; Cost; Environmental Economics and Policy; Q25; D58; D61; Q48.

Ano: 2005

URL: http://purl.umn.edu/10502

Fishing Quota Markets

Newell, Richard G.; Sanchirico, James N.; Kerr, Suzi.

Fisheries worldwide continue to suffer from the negative consequences of open access. In 1986, New Zealand responded by establishing an individual transferable quota (ITQ) system that by 1998 included 33 species and more than 150 markets for fishing quotas. We assess these markets in terms of trends in market activity, price dispersion, and the fundamentals determining quota prices. We find that market activity is sufficiently high to support a competitive market and that price dispersion has decreased over time. Using a 15-year panel dataset, we also find evidence of economically rational behavior through the relationship between quota lease and sale prices and fishing output and input prices, ecological variability, and market interest rates. Controlling...

Marine Reserves: Is There a Free Lunch?

Palavras-chave: Tradable permits; Individual transferable quota; Fisheries; Policy; Resource /Energy Economics and Policy; Q22; Q28; D40; L10.

Ano: 2002

URL: http://purl.umn.edu/10451

Sanchirico, James N.; Wilen, James E..

This paper employs a spatial and intertemporal model of renewable resource exploitation to investigate the effects of marine reserve creation. The model combines the H. S. Gordon/Vernon Smith hypothesis of a rent dissipation process with Ricardian notions that resources are exploited across space in a pattern dependent upon relative profitabilities. The metapopulation model employed here incorporates modern biological ideas that stress patch heterogeneity, linkages, and dispersal processes between patches. The spatial bioeconomic model is then used to simulate the effects of reserve creation under various ecological structures. We find, under certain parameter configurations and ecological linkages, that there is potential for a "double-dividend" where...

SPATIAL HETEROGENEITY, MOBILITY AND ACCESS: THE CASE OF RANGE MANAGEMENT IN THE SAHEL

Palavras-chave: Marine reserves; Spatial and intertemporal modeling; Bioeconomics; Resource /Energy Economics and Policy; C62; Q22; R10.

Ano: 1998

URL: http://purl.umn.edu/10715

Sanchirico, James N.; Wyatt, T.J..

In this paper, we develop and calibrate a spatial and intertemporal bioeconomic model of livestock production to the West African Sahel region. The model is then used to investigate the effects of land heterogeneity, range scale, and access rights on long term management of rangeland in the Sahel.

The Impacts of Marine Reserves on Limited-Entry Fisheries

Palavras-chave: Livestock Production/Industries.

Ano: 1999

URL: http://purl.umn.edu/21563

Sanchirico, James N.; Wilen, James E..

We utilize a spatial bioeconomic model to investigate the impacts of creating reserves on limited-entry fisheries. We find that reserve creation can produce win-win situations where aggregate biomass and the common license (lease) price increase. These situations arise in biological systems where dispersal processes are prevalent and the fishery prior to reserve creation is operating at effort levels in a neighborhood of open-access levels. We also illustrate that using strictly biological criteria for siting reserves (e.g., setting aside the most biological productive areas) will likely induce the most vociferous objections from the fishing industry. In general, we find that the dispersal rate and the degree the patches are connected play a significant...

Habitat Benefit Assessment and Decision-making: A Report to the National Marine Fisheries Service

Palavras-chave: Fisheries; Limited-entry; Marine reserves; Resource /Energy Economics and Policy; Q22; R10.

Ano: 2000

URL: http://purl.umn.edu/10487

Boyd, James; Sanchirico, James N.; Shabman, Leonard A..

Habitats and the services they provide are part of our nation's portfolio of natural capital assets. As for many components of this portfolio, it is difficult to assess the value of their services, and this complicates regulators' investment decisions, especially when the alternative use is measurable. The principal objective of this report is to suggest possible strategies for the National Marine Fisheries Service (NMFS) as it applies economic analyses and arguments in support of the agency's trustee responsibilities. Many approaches are possible, and as we discuss, the "right" strategy will depend on the questions asked, the resources available, and the agency's role in the consultation process. We discuss in detail bioeconomic modeling and ecosystem...

MULTISPECIES REVENUE FUNCTION ESTIMATION FOR NORTH PACIFIC GROUNDFISH FISHERIES

Palavras-chave: Bioeconomic; Ecological indicators; Ecosystem services; Resource /Energy Economics and Policy; Q20.

Ano: 2004

URL: http://purl.umn.edu/10904

Felthoven, Ronald G.; Larson, Douglas M.; Sanchirico, James N.; Shaikh, Sabina L.; Terry, Joseph M..

Multiproduct, multispecies revenue functions are estimated for the midwater and bottom-trawl pollock fisheries off Alaska. There are strong year and seasonal effects on coefficient estimates, and the technology is joint in outputs for each major operation type. The model is a step toward prediction of fishery regulatory effects.

Marine Protected Areas as Fishery Policy: A Discussion of Potential Costs and Benefits

Palavras-chave: Resource /Energy Economics and Policy.

Ano: 1998

URL: http://purl.umn.edu/20968

Sanchirico, James N..

Marine protected areas (MPAs) are currently receiving considerable attention as a "new" tool to control overexploitation. Many advocates argue that MPAs will provide a plethora of benefits ranging from improved habitat to higher fish stocks with little costs. Fishermen argue, not surprisingly, that the costs resulting from closing areas could be significant and need to be considered in the debate. In this paper, a set of biological, industry, and management hypotheses drawn from the literature analyzing the effects of MPAs are discussed. In doing so, a framework is presented that can be used to assess the expected returns to society from investing in MPAs.

Dynamics of Spatial Exploitation: A Metapopulation Approach

Palavras-chave: Renewable resources; Fisheries; Marine protected areas; No-take zones; Resource /Energy Economics and Policy; Q22; Q28.

Ano: 2000

URL: http://purl.umn.edu/10728

Sanchirico, James N.; Wilen, James E..

We present a bioeconomic model of a harvesting industry operating over a heterogeneous environment comprised of discrete biological populations interconnected by dispersal processes. The model generalizes the H. S. Gordon [1954]/V. Smith [1968] model of open-access rent dissipation by accounting for intertemporal and spatial "Ricardian" patterns of exploitation. This model yields a simple, but insightful, framework from which one can investigate factors that contribute to the evolution of resource exploitation patterns over space and time. For example, we find that exploitation patterns are driven by biological and fleet dispersal and biological and economic heterogeneity. We conclude that one cannot really understand the biological processes operating in...

Spatial Externalities and Vector-Borne Plant Diseases: Pierce’s Disease and the Blue-Green Sharpshooter in the Napa Valley

Palavras-chave: Renewable resources; Bioeconomics; Spatial modeling; Metapopulation; Environmental Economics and Policy; Q22; R19.

Ano: 2000

URL: http://purl.umn.edu/10513

Fuller, Kate B.; Alston, Julian M.; Sanchirico, James N..

Pierce’s Disease (PD) is a bacterial disease that can kill grapevines over a span of one to three years. In this paper, we examine and model PD and vector control decisions made at the vineyard level in the Napa Valley in an effort to understand how the pest and disease affect individual growers, and to examine spatial externality issues and potential benefits from cooperation between adjacent vineyards. The model that we created adds to the literature by (a) treating grape vines as capital stocks that take time to reach bearing age and thus cannot be immediately replaced in the event of becoming diseased. We also (b) relax the assumption of an interior solution by examining the boundaries of parameter space for which winegrape growing is profitable and...

A Social Scientist's Perspective on the Potential Benefits of the Census of Marine Life

Palavras-chave: Pierce’s Disease; Winegrapes; Perennial crop modeling; Agricultural pests and diseases; Optimal control theory; Crop Production/Industries; Production Economics; Resource /Energy Economics and Policy; Q12; Q24; C61.

Ano: 2011

URL: http://purl.umn.edu/103865

Sanchirico, James N..

Over 300 natural scientists in 53 nations are taking part in the Census of Marine Life (CoML) to investigate what lived, what lives, and what will live in the oceans. The CoML is a scientific experiment that is exploring the limits of ocean science. The paper discusses the potential applications of CoML research and the mechanisms by which the potential benefits can be measured and preserved. I recommend developing and integrating policy advisory committees with the natural science activities to both maximize the benefits of the research and to avoid unintended consequences.