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Registros recuperados: 12
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Are U.S. Corn and Soybeans Becoming More Drought Tolerant? 31
Yu, Tian; Babcock, Bruce A..
An objective drought index that measures the dry and hot conditions adversely affecting crop yields is used in a regression analysis to test whether corn and soybeans have become more drought tolerant. Results indicate that corn yield losses, whether measured in quantity terms or as a percentage of mean yield, have decreased. The null hypothesis that the absolute level of soybean yield losses due to drought has not changed cannot be rejected. But yield losses in percentage terms have decreased over time. Because drought is the primary cause of yield loss in the U.S. crop insurance program and because U.S. crop insurance rates assume that percentage of yield losses are constant over time, these results indicate that U.S. crop insurance rates in the Corn...
Tipo: Working or Discussion Paper Palavras-chave: Corn; Crop insurance rates; Drought tolerance; Soybean; Yield risk; Crop Production/Industries; Productivity Analysis; Risk and Uncertainty.
Ano: 2009 URL: http://purl.umn.edu/54147
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BARLEY PRODUCTION COSTS: A CROSS-BORDER COMPARISON 31
Johnson, D. Demcey; Janzen, Edward L..
Barley production costs are compared for five states and three Canadian provinces. A stochastic simulation, incorporating yield and exchange-rate risk, is used to characterize regional cost advantages in terms of probabilities.
Tipo: Working or Discussion Paper Palavras-chave: Barley; Production costs; Yield risk; Simulation analysis; Agricultural Finance; Production Economics.
Ano: 1999 URL: http://purl.umn.edu/23279
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CAN SPOT AND CONTRACT MARKETS CO-EXIST IN AGRICULTURE? 31
Carriquiry, Miguel A.; Babcock, Bruce A..
New production technologies, consumers who are more discriminating, and the need for improved coordination are among the forces driving the move from spot markets to contracts. Some worry that this tendency will result in the disappearance of spot markets, or at least that they will become too thin to be of help for an efficient price discovery process. Other authors point to the reduction in welfare of independent producers resulting from contracting in oligopsonistic industries. While a large body of literature is available tackling the contract versus spot market decision, much less is known about the reasons that lead to procurement in both markets. This paper provides a simple model to study how fundamental economic factors influence the contracting...
Tipo: Working or Discussion Paper Palavras-chave: Contract markets; Contracting in agriculture; Specialty grains; Spot markets; Yield risk; Marketing.
Ano: 2004 URL: http://purl.umn.edu/18634
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CAN SPOT AND CONTRACT MARKETS CO-EXIST IN AGRICULTURE? 31
Babcock, Bruce A.; Carriquiry, Miguel A..
New production technologies, consumers who are more discriminating, and the need for improved coordination are among the forces driving the move from spot markets to contracts. Some worry that this tendency will result in the disappearance of spot markets, or at least that they will become too thin to be of help for an efficient price discovery process. Other authors point to the reduction in welfare of independent producers resulting from contracting in oligopsonistic industries. While a large body of literature is available tackling the contract versus spot market decision, much less is known about the reasons that lead to procurement in both markets. This paper provides a very simple model to study how fundamental economic factors influence the...
Tipo: Working or Discussion Paper Palavras-chave: Contracting in agriculture; Spot markets; Yield risk; Marketing.
Ano: 2002 URL: http://purl.umn.edu/18404
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Influence of aggregation level on yield risk measures 31
Kobus, Pawel.
The paper is dedicated to the relationship of data aggregation level and yield variability. For that purpose yields of the major crop plants in Poland are analysed i.e.: winter wheat, triticale, rye, barley, oat, mixed cereals, rape and sugar beet. The research are based on data from Polish FADN from years 2004 – 2009. The samples’ size ranged from 531 to 2893, depending on the plant crop. In the paper six levels of data aggregation are examined, that is: farm, district, powiat1, voivodship, region and country. It was found out that the degree of yield variability reduction (observed with data aggregation) is crop specific. Nevertheless, the relationship between aggregation level and yield variability can be approximated by the same formula for all of the...
Tipo: Conference Paper or Presentation Palavras-chave: Yield risk; Aggregation level; Risk and Uncertainty.
Ano: 2011 URL: http://purl.umn.edu/114712
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Readdressing the Fertilizer Problem 31
Paulson, Nicholas D.; Babcock, Bruce A..
The production literature has shown that inputs such as fertilizer can be defined as risk-increasing. However, farmers also consistently overapply nitrogen. A model of optimal input use under uncertainty is used to address this paradox. Using experimental data, a stochastic production relationship between yield and soil nitrate is estimated. Numerical results show that input uncertainty may cause farmers to overapply nitrogen. Survey data suggest that farmers are risk averse, but prefer small chances of high yields compared to small chances of crop failures when expected yields are equivalent. Furthermore, yield risk and yield variability are not equivalent.
Tipo: Journal Article Palavras-chave: Corn; Nitrogen fertilizer; Risk-increasing; Yield risk; Crop Production/Industries.
Ano: 2010 URL: http://purl.umn.edu/97853
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Regional Yield Insurance for Arable Crops in EU-27 31
Bielza, Maria; Catenaro, Remo; Conte, Costanza G.; Gallego, Francisco J..
Replaced with revised version of paper 11/18/08.
Tipo: Conference Paper or Presentation Palavras-chave: Area yield insurance; Index insurance; Yield risk; Agricultural Finance; Risk and Uncertainty.
Ano: 2008 URL: http://purl.umn.edu/43690
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Risk in Agriculture: Modeling Revenue Insurance for Crop Farms in Belgium 31
Hansen, Kristiana; Frahan, Bruno Henry de.
With trade liberalization in the Common Agricultural Policy, farmers within the European Union are increasingly exposed to the risk of fluctuations in output price and yields. Using numerical simulation methods, we model the effects of crop insurance on farm revenues and land allocation patterns among arable crop farms in the Region of Wallonia in the south of Belgium. We employ a mathematical programming framework within which we have embedded an econometrically estimated, farm-specific cost function that allows us to analyze the farm-specific effects of crop insurance.
Tipo: Conference Paper or Presentation Palavras-chave: Crop insurance; Yield risk; Belgium; Agricultural and Food Policy; Risk and Uncertainty.
Ano: 2010 URL: http://purl.umn.edu/61535
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Spatial Aggregation and Weather Risk Management 31
Woodard, Joshua D.; Garcia, Philip.
Previous studies identify limited potential efficacy of weather derivatives in hedging agricultural exposures. In contrast to earlier studies which investigate the problem at low levels of aggregation, we find using straight forward temperature contracts that better weather hedging opportunities exist at higher levels of spatial aggregation. Aggregating production exposures reduces idiosyncratic (i.e. localized or region specific) risk, leaving a greater proportion of the total risk in the form of systemic weather risk which can be effectively hedged using weather derivatives. The aggregation effect suggests that the potential for weather derivatives in agriculture may be greater than previously thought, particularly for aggregators of risk such as...
Tipo: Conference Paper or Presentation Palavras-chave: Weather derivatives; Spatial aggregation; Corn; Yield risk; Crop insurance; Hedging; Risk and Uncertainty.
Ano: 2007 URL: http://purl.umn.edu/9832
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The impact of price and yield risk on the bioeconomics of reservoir aquaculture in north Vietnam 31
Petersen, Elizabeth H.; Hertzler, Greg; Schilizzi, Steven.
A bioeconomic model of reservoir aquaculture in northern Vietnam is used to investigate the impacts of price and yield risk on the level, variability and skewness of expected net revenue and utility. Prices and yields are assumed to follow lognormal and beta distributions, respectively. Net revenue follows a generalized gamma distribution and is found to be very risky compared with similar enterprises elsewhere, mainly due to the relatively high yield risk. This represents the nascent nature of the industry in Vietnam and the opportunity for efficiency improvements. Increasing production capacity (through increasing reservoir size, stocking density, production cycle length and harvest rate) are found to increase profits and decrease the variability of...
Tipo: Conference Paper or Presentation Palavras-chave: Bioeconomic modelling; Price risk; Yield risk; Aquaculture; Vietnam; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/10422
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Weather Effects on Trend, Variance and Distribution of Crop Yield 31
Yu, Tian; Babcock, Bruce A..
Favorable weather conditions for dryland crop production, including a proper amount of heat and rainfall during the growing season, are critical factors determining yield outcomes. Weather conditions however, are randomly distributed across regions and over time, thus influencing the temporal and geographical patterns of measured crop yield. Failure to account for weather factors when estimating crop yield distributions, time trends or productivity gains can lead to spurious conclusions regarding technology improvement, yield risk and skewness of yield. This paper addresses some limitations in the literature that result from not taking into account weather, and proposes an approach to incorporate weather into modeling yield.
Tipo: Conference Paper or Presentation Palavras-chave: Corn yield; Distribution; Trend; Yield risk; Agricultural Finance.
Ano: 2010 URL: http://purl.umn.edu/60908
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การเลือกใช้เมล็ดพันธุ์ข้าวโพดกับผลตอบแทนที่เกษตรกรได้รับ: กรณีศึกษาอำเภอตากฟ้า จังหวัดนครสวรรค์ ปีการเพาะปลูก 2552 106
Visit Limsombunchai; Sanit Kao-ian.
Objectives of this study were to investigate the cost and return to farmers on their corn production classified by varieties in Tak Fa district, Nakhon Sawan province in 2009 crop year. Out of 122 farm samples, 75, 13, 19 and 15 farms were found using variety A, B, C and others, respectively. The results showed that most of the farms had a similar production pattern. In addition, it was found that variety B had the highest cost of production, average yield, revenue and net profit (3,667.3 Baht/Rai 1,112.9 Kg./Rai 4,218.0 Baht/Rai and 550.7 Baht/Rai, respectively). Furthermore, the results indicated that variety C had the lowest yield risk while variety B had the lowest price risk. The study suggested that variety A was appropriate for the risk adverse...
Palavras-chave: Corn seed; Return to farmers; Yield risk; Price risk; ข้าวโพดเลี้ยงสัตว์; การผลิต; ปัจจัยการผลิต; พันธุ์; เมล็ดพันธุ์; ต้นทุน; ผลตอบแทน; รายได้; กำไร; ผลผลิต; ราคา; ความเสี่ยง; จ.นครสวรรค์ อ.ตากฟ้า.
Ano: 2010 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/4689
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