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| Registros recuperados: 10.260 | |
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| Hillberry, Russell H.; McDaniel, Christine A.. |
| Total U.S. trade with NAFTA partners has increased 78 percent in real terms since 1993U.S.-Mexico trade alone is up 141 percentcompared to a 43 percent increase in U.S. trade with the rest of the world. In this article we compare the nature of U.S. trade growth with Canada and Mexico to growth in U.S. trade with non-NAFTA partners. We apply a simple decomposition of trade growth offered by Hummels and Klenow (2002) that provides insights into whether the United States is trading more of the same goods with NAFTA partners since 1993, or trading new products. The results provide evidence of both. A sizeable component of U.S. trade growth since 1993 can be explained by increases in the variety of products the U.S. imports from Mexico. |
| Tipo: Working or Discussion Paper |
Palavras-chave: International Relations/Trade. |
| Ano: 2002 |
URL: http://purl.umn.edu/15866 |
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| Berges, Miriam E.; Casellas, Karina S.. |
| The purpose of this paper is to provide some microeconomics tools to discuss and evaluate public policies that imply transfers of income from the public sector to the poor and their impact on their food demand and calories and nutrient intakes. This study is concerned with the differences in subsistence expenditures, own-price elasticities and income elasticities for two households groups segmented by income: those people below the poverty guideline and those above it. The attention of our research is focused on a demand system for all food groups included in a National Consumption Survey and examines the household food consumption behavior by partitioning the sample. A complete system of demand equations, the Linear Expenditure System (LES), has been used... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Food Demand System; Censored Sample; Own-Price and Income Elasticities; Poverty Status; Demand and Price Analysis. |
| Ano: 2002 |
URL: http://purl.umn.edu/24815 |
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| Mikich,Sandra Bos. |
| The diet of some leaf-nosed frugivorous bats - Artibeus Leach, 1821, Carollia perspicillata (Linnaeus, 1758) and Sturnira lilium (e. Geoffroy, 1810) - was studied for nine consecutive months through faecal analysis of individuais captured with mist-nets in a small forest remnant of Paraná state, Brazil. The analysis revealed that Artibeus spp. exhibited preference for fruits of Ficus spp. and Carollia perspicillata for those of Piper spp., which is in accordance with the results of previous studies. But contrary to what was expected, fruit of Solanum spp. were not found for the diet of Sturnira lilium in spite of their high availabilily (16 species) in the study area and their known relationship with this bat genus. The species of consumed fruit belonged... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chiroptera; Phyllostomidae; Frugivory; Seed dispersai; Brazil. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000100023 |
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| RABELO,Hermógenes; ARAÚJO-LIMA,Carlos A.R.M.. |
| Avaliar a dieta, o ritmo alimentar e a taxa de consumo diária de alimento dos peixes pode permitir estimar a relação entre a alimentação e o crescimento, a pressão de predação sobre espécies de presas, a limitação alimentar durante estações do ano e a competição intra e inter-específica. Estas informações são desconhecidas para C.monoculus na Amazônia Central e aqui são apresentados dados sobre a ecologia trófica desta espécie durante quatro estações hidrológicas. A área de estudo incluía três lagos de várzea na Amazônia Central, durante os períodos de agosto de 1997 a julho de 1998. Os estudos da dieta e do ritmo alimentar foram feitos através das análises dos conteúdos estomacais. A taxa de evacuação gástrica foi estimada experimentalmente. O consumo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cichla; Amazônia; Peixes; Alimentação; Consumo diário. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672002000400707 |
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| McDaniel, Christine A.; Balistreri, Edward J.. |
| Applied partial and general equilibrium models used to examine trade policy are almost universally sensitive to trade elasticities. Indeed, the Armington elasticity, the degree of substitution between domestic and imported goods, is a key behavioral parameter that drives the quantitative, and sometimes the qualitative, results that policymakers use. While standard transparent approaches to econometric estimation of these elasticities have been offered for the last 30 years, the estimates are viewed as too small by many trade economists. A few robust findings emerge from the econometric literature: (1) more disaggregate analyses find higher elasticities, (2) long-run estimates are higher than short-run estimates, and (3) time series analyses generally find... |
| Tipo: Working or Discussion Paper |
Palavras-chave: International Relations/Trade. |
| Ano: 2002 |
URL: http://purl.umn.edu/15856 |
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| Chen, G; Chapron, Bertrand; Ezraty, Robert; Vandemark, D. |
| More than a dozen of wind speed (U) algorithms have been proposed during the past 2 decades, as a result of a continuing effort to improve altimeter wind measurement. The progress in terms of accuracy, however, is seen to be rather slow. The reported root mean square (RMS) error of prevailing algorithms varies mostly between 1.6 and 2.0 m/s for the dominant wind regime. As far as the TOPEX altimeter is concerned, three measured quantities, namely, the radar cross sections from Ku and C band (sigma(Ku) and sigma(C)), as well as the significant wave height (H-s), have been used in previous algorithm developments, resulting in a variety of single-, dual-, and three-parameter model functions. On the basis of the finding of a banded dependency of the... |
| Tipo: Text |
Palavras-chave: Sea surface wind speed; Retrieval; TOPEX; Altimeter; Dual frequency. |
| Ano: 2002 |
URL: https://archimer.ifremer.fr/doc/00000/10224/9579.pdf |
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| Kim, Kwansoo; Chavas, Jean-Paul. |
| This study presents an econometric analysis of the effects of a government price support program on price dynamics and price volatility. Price support programs, a common feature of agricultural policy, provide a lower-bound censoring of the distribution of market prices. An econometric model of market prices is developed using a dynamic Tobit specification under time-varying volatility. The model is applied to the U.S. non-fat dry milk market. It is used to investigate the impact of market liberalization on price dynamics and price volatility in the presence of private and public stocks. The econometric results show how the price support program and stocks (both private and public) affect expected price volatility. |
| Tipo: Journal Article |
Palavras-chave: Agricultural and Food Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/31133 |
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| Schwabe, Kurt A.; Schuhmann, Peter W.; Tonkovich, M.. |
| The costs of deer-vehicle collisions (DVCs) nationwide are estimated to be in excess of $1 billion annually. In this study, factors contributing to the abundance of DVCs are identified and the potential effectiveness of various deer management strategies in reducing DVCs is investigated. The added benefits of such strategies are also evaluated in a bioeconomic context by comparing alternative outcomes achievable from implementing DVC mitigation techniques. Focusing on Ohio, results suggest potentially large economic gains exist from reducing DVCs, especially with strategies that combine both deer management schemes and DVC mitigation techniques. |
| Tipo: Journal Article |
Palavras-chave: Resource /Energy Economics and Policy. |
| Ano: 2002 |
URL: http://purl.umn.edu/31078 |
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| Du Bocage,Ana Luiza; Sales,Margareth Ferreira de. |
| O presente trabalho consiste de um estudo taxonômico sobre a família Bombacaceae no Estado de Pernambuco, Brasil. Constatou-se a ocorrência de sete espécies distribuídas em seis gêneros: Bombacopsis retusa (Mart. & Zucc.) A. Robyns, Ceiba glaziovii (Kuntze) K. Schum., Eriotheca crenulaticalyx A. Robyns, Pachira aquatica Aubl., Pseudobombax marginatum (A. St.-Hil.) A. Robyns, Pseudobombax simplicifolium A. Robyns e Quararibea turbinata (Sw.) Poir. Chave para identificação das espécies, descrições, material examinado, ilustrações e comentários sobre distribuição geográfica e habitat são apresentados. Bombacopsis retusa e Pseudobombax marginatum são referidas pela primeira vez para Pernambuco. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Taxonomia; Levantamento; Bombacaceae; Pernambuco; Brasil. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062002000200001 |
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| Louis, Garrick; Shih, Jhih-Shyang. |
| Most of the United States have laws mandating the recycling of municipal solid waste (MSW). In order to comply, municipalities recycle quotas of materials, without regard to fluctuating prices. An inventory system is proposed that allows municipalities to be sensitive to materials prices as they recycle in accordance with state mandates. A dynamic model is developed; it uses historical secondary material prices as exogenous inputs to minimize the net present value of MSW recycling system cost. The model provides a cost-effective method for municipalities to achieve their MSW recycling targets. The savings is approximately $1.43 per ton of MSW generated based on total MSW management costs of $13.5 per ton. The model also allows one to investigate the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Municipal solid waste; Recycling; Inventory; Optimization; Environmental Economics and Policy; Q2. |
| Ano: 2002 |
URL: http://purl.umn.edu/10459 |
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| Petersen, B.M.; Olesen, J.E.; Heidmann, T.. |
| Existing models of soil organic matter (SOM) turnover are implemented within rigid and often complex modelling environments, which makes the testing of influence of SOM model structure a rather difficult task. A new soil carbon turnover simulation tool is presented (C-TOOL v. 1.0). It facilitates the construction of a wide range of user-definable SOM models based on linked SOM pools and a decay described for each pool by first order kinetics. Simulation of carbon isotopes 13C and 14C is facilitated. No programming is necessary for defining or redefining models, as the model structure is given in set-up files. The program is fast, and can utilise a range of time-steps, which enhances the computation of steady level SOM contents. The ability of C-TOOL to... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2002 |
URL: http://orgprints.org/85/1/85.doc |
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| The WEHAB initiative was proposed by UN Secretary- General Kofi Annan as a contribution to the preparations for the World Summit on Sustainable Development (WSSD). It seeks to provide focus and impetus to action in the five key thematic areas of Water, Energy, Health, Agriculture and Biodiversity and sustainable ecosystem management that are integral to a coherent international approach to the implementation of sustainable development and that are among the issues contained in the Summit’s Draft Plan of Implementation. |
| Tipo: Report |
Palavras-chave: Biodiversity; Ecosystem management. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/847 |
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| Topp, Cairistiona F E; Doyle, Chris J; Watson, Christine A. |
| This report was presented at the UK Organic Research 2002 Conference of the Colloquium of Organic Researchers (COR). Organic farming systems rely on the management of biological cycles for the provision of nutrients, which are crucial to maximising the production from the system. Rotations based on the use of grass-legume leys are central to the concept of organic farming systems, because they have the potential to support both animal production, and a subsequent, exploitative, arable cropping phase. A major challenge in organic farming is managing the supply of nitrogen, since it has a key role in governing both productivity and environmental impact. Hence, within a rotational system, there is a need to understand the complex interactions that are... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions; Farming Systems; Crop husbandry. |
| Ano: 2002 |
URL: http://orgprints.org/8295/1/topp_Framework_assessing_crop_production.pdf |
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| Lyford, Conrad P.; Ricks, Donald J.; Peterson, H. Christopher; Sterns, James A.. |
| As agricultural commodity industries strategically plan for their future, they need to consider the systemic and synergistic effects of such factors as changing government regulations, demand expansion or contraction, globalized markets, increased competitive pressures, and greater customer quality requirements. This article discusses a framework developed to help industries strategically plan within the context of these dynamic factors. This framework, based upon relevant theory and an accumulation of experiences with this type of strategic planning, provides one possible approach for addressing the strategic needs of an entire industry. In this way, a commodity industry as a whole can identify and address key industrywide strategic issues to maintain and... |
| Tipo: Journal Article |
Palavras-chave: Framework; Industry; Strategic planning; Agribusiness. |
| Ano: 2002 |
URL: http://purl.umn.edu/14721 |
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| Registros recuperados: 10.260 | |
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