Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 16
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Does size matter? An assessment of quota market evolution and performance in the Great Barrier Reef fin-fish fishery Ecology and Society
Innes, James; CSIRO Oceans and Atmospheres Flagship; James.Innes@csiro.au; Little, L. Richard; CSIRO Oceans and Atmospheres Flagship; Rich.Little@csiro.au.
In fisheries managed using individual transferable quotas (ITQs) it is generally assumed that quota markets are well-functioning, allowing quota to flow on either a temporary or permanent basis to those able to make best use of it. However, despite an increasing number of fisheries being managed under ITQs, empirical assessments of the quota markets that have actually evolved in these fisheries remain scarce. The Queensland Coral Reef Fin-Fish Fishery (CRFFF) on the Great Barrier Reef has been managed under a system of ITQs since 2004. Data on individual quota holdings and trades for the period 2004-2012 were used to assess the CRFFF quota market and its evolution through time. Network analysis was applied to assess market structure and the nature of...
Tipo: Peer-Reviewed Reports Palavras-chave: Catch shares; Great Barrier Reef; Line fishery; Market efficiency; Social network analysis; Transaction costs.
Ano: 2014
Imagem não selecionada

Imprime registro no formato completo
Does size matter? An assessment of quota market evolution and performance in the Great Barrier Reef fin-fish fishery ArchiMer
Innes, James; Thebaud, Olivier; Norman-lopez, Ana; Little, L. Richard.
In fisheries managed using individual transferable quotas (ITQs) it is generally assumed that quota markets are well-functioning, allowing quota to flow on either a temporary or permanent basis to those able to make best use of it. However, despite an increasing number of fisheries being managed under ITQs, empirical assessments of the quota markets that have actually evolved in these fisheries remain scarce. The Queensland Coral Reef Fin-Fish Fishery (CRFFF) on the Great Barrier Reef has been managed under a system of ITQs since 2004. Data on individual quota holdings and trades for the period 2004-2012 were used to assess the CRFFF quota market and its evolution through time. Network analysis was applied to assess market structure and the nature of...
Tipo: Text Palavras-chave: Catch shares; Great Barrier Reef; Line fishery; Market efficiency; Social network analysis; Transaction costs.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00230/34112/32587.pdf
Imagem não selecionada

Imprime registro no formato completo
Do USDA Announcements Affect Comovements Across Commodity Futures Returns? AgEcon
Karali, Berna.
The value of USDA reports has long been a question of interest for researchers and practitioners. However, the impact of announcements on comovements across related commodity prices has not been explored beyond financial asset markets. This is important because the structure of the relationship between commodities could change depending on the type of information revealed in the announcement, thus affecting price perceptions, hedging ratios, and portfolio return variance. This study simultaneously measures the impact of selected USDA reports on the conditional variances and covariances of returns on corn, lean hogs, soybeans, soybean meal, and soybean oil futures contracts using a multivariate GARCH model. It is shown that the largest movements in...
Tipo: Article Palavras-chave: Announcement effects; Futures markets; Market efficiency; Multivariate GARCH; USDA reports; Agricultural Finance; Financial Economics; Political Economy.
Ano: 2012 URL: http://purl.umn.edu/122315
Imagem não selecionada

Imprime registro no formato completo
Impacts of the Economic Reform Program on the Performance of the Egyptian Agricultural Sector AgEcon
Soliman, Ibrahim; Fabiosa, Jacinto F.; Gaber Amer, Mohamed; Kandil, Siham.
From 1986 to 2007 Egypt’s agricultural policy transitioned from a tightly controlled to a more liberalized regime. This study examines the impact of this change on the performance of the wheat (imported grain) and rice (exported grain) sectors. In terms of profitability, we found that the cost of production increased substantially in both grains, driven primarily by the rise in land rent and labor wage. But the wheat and rice sectors’ profitability did not suffer significantly, as advances in new seed technologies and adoption of better farm practices including farm mechanization increased yield and compensated for the higher cost. Considering market efficiency, we found that over the study period the farmer’s share of the consumer’s expenditure...
Tipo: Working or Discussion Paper Palavras-chave: Agricultural liberalization; Area response elasticity; Market efficiency; Profitability.; Agricultural and Food Policy; Crop Production/Industries; Production Economics.
Ano: 2010 URL: http://purl.umn.edu/93033
Imagem não selecionada

Imprime registro no formato completo
Are Corn and Soybean Options Too Expensive? AgEcon
Urcola, Hernan A.; Irwin, Scott H..
A growing body of recent evidence suggests that premiums for financial options might be too high. For agricultural options, market participants often make similar claims, however there is very limited scientific literature to prove or disprove such claims. This research investigates the efficiency of corn and soybean options markets by directly computing trading returns. Time effects on market efficiency are also investigated. When the sample period is considered as a whole, risk adjusted returns indicate that no profits can be made by taking either side of the corn or soybean options markets. However, when time effects are analyzed, corn calls appear to have provided excess returns during the 1998--2005 period. This result do not appear to be driven by...
Tipo: Conference Paper or Presentation Palavras-chave: Corn; Soybeans; Options markets; Mispricing; Trading returns; Market efficiency; Crop Production/Industries; Marketing.
Ano: 2006 URL: http://purl.umn.edu/19006
Imagem não selecionada

Imprime registro no formato completo
Can Multiyear Rollover Hedging Increase Mean Returns? AgEcon
Yoon, Byung-Sam; Brorsen, B. Wade.
Both market advisors and researchers have often suggested multiyear rollover hedging as a way to increase producer returns. This study determines whether rollover hedging can increase expected returns for producers. For rollover hedging to increase expected returns, futures prices must follow a mean-reverting process. To test for the existence of mean reversion in agricultural commodity prices, this study uses a longer set of price data and a wider range of test procedures than past research. With the use of both the return predictability test from long-horizon regression and the variance ratio test, we find that mean reversion does not exist in futures prices for corn, wheat, soybean, soybean oil, and soybean meal. The findings are consistent with...
Tipo: Journal Article Palavras-chave: Market efficiency; Mean reversion; Random walk; Rollover hedging; Agricultural Finance; Risk and Uncertainty; Q13; G13.
Ano: 2005 URL: http://purl.umn.edu/43713
Imagem não selecionada

Imprime registro no formato completo
CONCENTRATION AND TECHNOLOGY IN AGRICULTURAL INPUT INDUSTRIES AgEcon
King, John L..
Consolidation in the agricultural biotechnology industry can both enhance and dampen market competition. This report examines the causes and consequences of industry consolidation and its effect on market efficiency. In some cases, concentration realizes economies of scale, which can improve market efficiency by driving down production costs. The protection of intellectual property rights is integral to the agricultural biotechnology marketplace, stimulating research and development, investment, and the development of substitute markets. However, excessively broad intellectual property rights can hinder the market for innovation. Recent data on mergers, acquisitions, and strategic collaborations in the agricultural biotechnology industry, as well as the...
Tipo: Report Palavras-chave: Industry concentration; Consolidation; Biotechnology; Market efficiency; Market power; Intellectual property rights; Agricultural input industries; Mergers; Acquisitions; Agribusiness; Industrial Organization.
Ano: 2001 URL: http://purl.umn.edu/33631
Imagem não selecionada

Imprime registro no formato completo
Institutional Impact of GATT: An Examination of Market Integration and Efficiency in the World Beef and Wheat Market under the GATT Regime AgEcon
Fabiosa, Jacinto F..
Studies on the General Agreement on Tariffs and Trade (GATT) are abundant in the literature. But most researchers have examined GATT's impact on economic activities with scant or no attention given to its impact on institutions such as market integration and efficiency. To the latter issues, this paper is addressed. Even prior to the signing of the final act, questions were raised on possible maneuvers that might frustrate its intent, that of ushering in an era of true liberalization in agricultural trade. This study finds consistent evidence that GATT reforms promoted market integration and improved market efficiency. Decomposition of price variability into its various sources shows that the transmission of shocks becomes more widespread across markets...
Tipo: Working or Discussion Paper Palavras-chave: Market integration; Market efficiency; Cointegration; Vector autoregression; GATT; Beef and wheat markets; International Relations/Trade.
Ano: 1999 URL: http://purl.umn.edu/18508
Imagem não selecionada

Imprime registro no formato completo
FORECASTING ACCURACY, RATIONAL EXPECTATIONS AND MARKET EFFICIENCY IN THE US BEEF CATTLE INDUSTRY AgEcon
Schaefer, Matthew P.; Myers, Robert J..
Recent studies have tested whether futures prices respond to U.S. Department of Agriculture inventory reports in accordance with the efficient markets hypothesis. These studies use survey forecasts to identify the anticipated and unanticipated information contained in a report. However, this approach implicitly assumes that survey forecasts be an unbiased and efficient predictor of the data in the USDA report. Furthermore, previous studies have not tested the bias and efficiency properties of USDA preliminary estimates as predictors of final revised USDA figures. This study introduces a framework for conducting tests of the efficient markets hypothesis in the presence of biased and inefficient survey forecasts, and preliminary USDA estimates that are...
Tipo: Conference Paper or Presentation Palavras-chave: Market efficiency; Rational expectations; Survey forecasts; Cattle On-Feed Report; Financial Economics; Livestock Production/Industries; Production Economics.
Ano: 1999 URL: http://purl.umn.edu/21487
Imagem não selecionada

Imprime registro no formato completo
THE EFFECTS OF FUTURES TRADING BY LARGE HEDGE FUNDS AND CTAS ON MARKET VOLATILITY AgEcon
Holt, Bryce R.; Irwin, Scott H..
This study uses the newly available data from the CFTC to investigate the market impact of futures trading by large hedge funds and CTAs. Regression results show that there is a positive relationship between the trading volume of large hedge funds and CTAs and market volatility. However, a positive relationship between hedge fund and CTA trading volume and market volatility is consistent with either a private information or noise trader hypothesis. Three additional tests are conducted to distinguish between the private information hypothesis and the noise trader hypothesis. The first test consisted of identifying the noise component exhibited in return variances over different holding periods. The variance ratio tests provide little support for the noise...
Tipo: Conference Paper or Presentation Palavras-chave: Hedge fund; Commodity trading advisor; Volatility; Market efficiency; Futures markets; Marketing.
Ano: 2000 URL: http://purl.umn.edu/18935
Imagem não selecionada

Imprime registro no formato completo
NORTH AMERICAN AGRICULTURAL MARKET INTEGRATION AND ITS IMPACT ON THE FOOD AND FIBER SYSTEM AgEcon
Vollrath, Thomas L..
Economic change and market dynamics have fundamentally altered the structure and performance of agricultural markets in the United States, Canada, and Mexico within the last 25 years. Many factors have helped shape the current North American food and fiber system, including technological change, domestic farm policies, international trade agreements, and the economic forces of supply and demand. Ratification of NAFTA, for example, helped integrate the North American market, sparking a surge in trade and investment among the United States, Canada, and Mexico. In recent years, efforts to further integrate the continental market seem to have slowed. Broadening the scope of NAFTA to include institutional reforms that lead to a more unified system of commercial...
Tipo: Report Palavras-chave: Agriculture; Market integration; Market segmentation; Law of one price; Price transmission; Elasticities; Exchange-rate pass-through; Market efficiency; Bilateral trade intensity; Regional trade agreements; NAFTA; CUSTA; Trade policy; WTO; GATT; Industrial Organization; International Relations/Trade; Marketing.
Ano: 2003 URL: http://purl.umn.edu/33639
Imagem não selecionada

Imprime registro no formato completo
Mezőgazdasági fedezeti ügyletek és piaci hatékonyságuk a Budapesti Értéktőzsdén AgEcon
Halmos, Kornel.
A mezőgazdasági vállalkozásokban jelentős kockázat az árkockázat. Fedezeti ügyletekkel aktív kockázatkezelést folytató gazdálkodók száma jelentősen elmarad a nemzetközi átlagtól. Az árutőzsde hatékony működése szükséges ahhoz, hogy megfelelő határidős ügyletekkel az árkockázat eliminálható legyen. A hatékonysági vizsgálatok igazolták a gyenge szintű tőkepiaci hatékonyság meglétét, így a hazai határidős piac ebből a szempontból alkalmas a hatékony kockázatmenedzsmentre. Ugyanakkor a hatékonyság rendre elmarad a fejlettebb azonnali részvénypiaci szekciótól. A piaci likviditás és párhuzamosan a piaci hatékonyság jelentősen növelhető lenne, amennyiben a mezőgazdasági vállalkozások megismernék, megértenék a határidős piacokban lévő kockázatmérséklési...
Tipo: Journal Article Palavras-chave: Fedezeti ügylet; Hatékonyság; Árutőzsde; Kockázatkezelés; Hedge transaction; Market efficiency; Produce exchange; Agricultural risk management; Market liquidity; Agricultural Finance; Financial Economics.
Ano: 2010 URL: http://purl.umn.edu/99174
Imagem não selecionada

Imprime registro no formato completo
What Influences Price Efficiency in Indigenous Chicken Markets in Africa? Evidence from Smallholder Farmers in Kenya AgEcon
George, Owuor; Bocklain, Bebe.
This study explored appropriate options for smallholders to maximise market price for Indigenous chicken products in rural and urban markets in Western Kenya (Rongo, Homabay and Kisii in 2008 with results revealing that, the major participants along the indigenous chicken supply chains are village brokers, distant traders, and urban assemblers, who eventually sell hotels, butchers and households. Buyers preferred hens followed by cocks, and attached greater preference on weight and high market prices. The price differential was un-uniform, with the larger differentials recorded between farmers and the middlemen. Turnover and losses were however the key determinants of the selling price. The study thus recommends training of farmers on the market linkages...
Tipo: Conference Paper or Presentation Palavras-chave: Indigenous chicken; Market efficiency; Kenya; Agribusiness; Productivity Analysis.
Ano: 2009 URL: http://purl.umn.edu/53075
Imagem não selecionada

Imprime registro no formato completo
ROLLOVER HEDGING AgEcon
Yoon, Byung-Sam; Brorsen, B. Wade.
Both market advisors and researchers have often suggested rollover hedging as a way of increasing producer returns. This study tests whether rollover hedging can increase expected returns for producers. For rollover hedging to increase expected returns, futures prices must follow a mean-reverting process. Using both the return predictability test based on long-horizon regression and the variance ratio test, we find that mean reversion does not exist in futures prices for corn, wheat, soybeans, soybean oil and soybean meal. The findings are consistent with the weak form of market efficiency. The results of the study imply that rollover hedging should not be seriously considered as a marketing alternative. As long as the commodity markets are efficient, the...
Tipo: Conference Paper or Presentation Palavras-chave: Rollover hedging; Mean reversion; Market efficiency; Marketing.
Ano: 2000 URL: http://purl.umn.edu/18938
Imagem não selecionada

Imprime registro no formato completo
THE PERFORMANCE OF AGRICULTURAL MARKET ADVISORY SERVICES IN MARKETING WHEAT AgEcon
Jirik, Mark A.; Irwin, Scott H.; Good, Darrel L.; Jackson, Thomas E.; Martines-Filho, Joao Gomes.
The purpose of this paper is to investigate the performance of agricultural market advisory services in marketing wheat. Two key performance questions are addressed: 1) Do market advisory services, on average, outperform an appropriate wheat market benchmark? and 2) Do market advisory services exhibit persistence in their wheat performance from year-to-year? Market advisory service recommendations for wheat are available from the AgMAS Project for the 1995, 1996, 1997 and 1998 marketing years. At least 20 advisory programs are included for each year. Tests of pricing performance relative to a market benchmark are based on the proportion of programs exceeding the benchmark price and the average percentage difference between the net price of advisory...
Tipo: Conference Paper or Presentation Palavras-chave: Wheat; Market advisory service; Benchmark; Market efficiency; Pricing performance; Predictability; Crop Production/Industries; Marketing.
Ano: 2000 URL: http://purl.umn.edu/18928
Imagem não selecionada

Imprime registro no formato completo
On trade efficiency in the Ethiopian agricultural markets AgEcon
Quattri, Maria A..
The availability of enabling institutions, information systems and infrastructure is a precondition to enhance agricultural markets’ efficiency, and make market actors less vulnerable to price instability. This paper investigates whether the focus on institutional and technological upgrading is enough to make Ethiopian agricultural markets more efficient. In particular, given that a requirement for exchange efficiency is the lack of unexploited mutually beneficial spatial arbitrage opportunities, we look for evidence of increasing returns to transaction size and returns to scale in transport using detailed trader surveys collected in 2001 and 2007. Whilst transport costs could be reduced by assembling loads and avoiding trans-shipments for the...
Tipo: Presentation Palavras-chave: Ethiopia; Market efficiency; International Development; Risk and Uncertainty; O13; Q13.
Ano: 2012 URL: http://purl.umn.edu/122512
Registros recuperados: 16
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional