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Всего публикаций в данном разделе: 52

Авторы:
АБ ВГДЕЖЗИЙК Л МНОП Р С ТУ ФХЦЧШ ЩЭЮЯ
A B C D E F G H I J K L M N O P QR S T U V W X Y Z
 
Названия:
все А БВ ГДЕЖЗИЙКЛМНОП Р СТУФХЦЧШЩЭЮЯ
A BC D E F G H I JKL M N O P Q R S TU V W XY Z
 

Опубликовано на портале: 30-11-2003
Alexander Sarris
2003
The paper considers the benefit to agricultural producers from commodity price insurance that provides in every year, but in advance of the resolution of production and price uncertainty, a minimum price for a fixed or variable portion of production. Under the assumption that producers do not change their long term production and income diversification pattern, the theoretical framework suggested leads to explicit formulas for the benefit from providing this type of insurance. The theoretical framework is implemented for Ghana, using the GLSS data to specify various classes of cocoa producing households, and monthly price data for both domestic and international prices to formulate appropriate models for ascertaining price risks faced by producers. Empirical estimates of the actuarially fair premium are given, and it is shown that they are smaller than market based put option prices from organized exchanges. The overall benefit to households, however, turns out to be substantially higher than the actuarially fair premiums, as well as the market based put option prices, due both to the magnitudes of the uncertainties facing the households, as well as their risk and consumption smoothing behavior.
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Опубликовано на портале: 30-11-2003
Samuel Benin, Melinda Smale, Berhanu Gebremedhin, John Pender, Simeon K. Ehui
2003
On farm conservation of crop diversity entails policy challenges, especially when the diversity of crops maintained on farms has both inter-specific (among crops) and infra-specific (within a crop) components. Survey data is used to compare the determinants of inter- and infra-specific diversity on household farms in the highlands of northern Ethiopia. Physical features of the farm, and household characteristics such as livestock assets and the proportion of adults that are men, have large and significant effects on both the diversity among and within cereal crops grown, varying among crops. Demographic aspects such as age of household head and adult education levels affect only infra-specific diversity of cereals. Though there are no apparent trade-offs between policies that would enhance one type of diversity (richness) versus another (evenness), those designed to encourage infra-specific diversity in one cereal crop might have the opposite effect on another crop. Trade-offs between development and diversity in this resource-poor system are not evident. Market-related variables and population density have ambiguous effects. Education positively influences cereal crop diversity. Growing modern varieties of maize or wheat does not detract from the richness or evenness of these cereals on household farms.
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Опубликовано на портале: 30-11-2003
Imre Ferto, Lionel G. Hubbard
2003
We analyse the evolving pattern of Hungary.s agri-food trade using recently developed empirical procedures based on the classic Balassa index and its symmetric transformation. The extent of trade specialisation exhibits a declining trend; Hungary lost comparative advantage for a number of product groups over the 1990s. The indices of specialisation have also tended to converge. For particular product groups, the picture is mixed: indices are reasonably stable for product groups with comparative disadvantage, but those with weak to strong comparative advantage show significant variation. The results reinforce the finding of a general decrease in specialisation, but do not support the idea of self-reinforcing mechanisms, emphasised strongly in much of the endogenous growth and trade literature.
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Опубликовано на портале: 30-11-2003
Henrik Zobbe
2002
The Common Agricultural Policy (CAP) was founded in the 1950s with price support as the main policy instrument. Despite massive criticism from both within and outside the EU, price support remains the backbone of the CAP. This paper argues that the choice of price support was logical viewed in both historical and economical perspectives, and gives three reasons for this. First, even though talks on agricultural integration began immediately after the war, the CAP was a result of general economic integration in Europe rather than the reason for it. Second, the structure of the CAP was determined by the agricultural policies of the six founding countries. The third and last reason is related to the economic characteristics of running a price support system. The six countries together were net importers of agricultural products and could thereby benefit from import levies. Price support is paid for by the consumers, and European consumers had been paying high prices for food for a long time. This, together with a high level of economic growth in Europe in the 1960s, made it easier for the governments to choose this policy rather than a policy based on direct payments financed by taxpayers that would have put pressure on the national fiscal budgets of the six countries.
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Опубликовано на портале: 30-11-2003
K.N. Ninan, Jyothis Sathyapalan
2003
This paper analyses the economics of biodiversity conservation in the context of a tropical forest ecosystem in India, where coffee is the main competitor for land use. Using primary data covering a cross-section of coffee growers, the study notes that the opportunity costs of biodiversity conservation in terms of coffee benefits foregone are quite high. Even after including external costs due to wild life damages and defensive expenditure to protect against wild life, the NPVs and IRRs from coffee for all land holding groups were high. Even if the expected benefits were to decrease by 20% and costs rise by a similar proportion, still the IRRs from coffee were quite high (19.5 to 20.1 per cent). The study notes that the external costs accounted for between 7 to 15 per cent of the total discounted costs of coffee cultivation, and smaller holdings proportionately incurred higher external costs as compared to large holdings. The study also notes high transaction costs incurred by the growers to claim compensation for wild life damages. Notwithstanding these disincentives, the study notes that the local community were willing to pay in terms of time for participatory biodiversity conservation, and they preferred a decentralized government institution for this purpose.
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Опубликовано на портале: 30-12-2003
Javier Calatrava-Leyva, Alberto Garrido
Durban, 2003
Water availability in semiarid regions commonly exhibits patterns of extreme variability. Even in basins with large infrastructure development, some users are subject to low levels of water reliability, incurring economic losses during periods of scarcity. More flexible instruments, such as voluntary exchanges of water among users, may help users reduce their risk exposure. Recent changes in the Spanish water Law have given an initial impulse to allow for lease-out contracts of water use rights. This paper analyses, from theoretical and empirical standpoints, the effect that establishing water markets has on the economic risk caused by water availability variations.

The empirical study is performed on an irrigation district of the Guadalquivir Valley (Spain) with fair levels of average water availability but a high probability of periods of extreme scarcity. A non-linear programming model is used to simulate irrigators’ behaviour and derive water demand functions. Another spatial equilibrium model is used to compute market exchange and equilibrium. These programming models are combined with statistical simulation techniques. It is shown that the probability distribution of profits for a representative irrigator is modified if water exchanges are authorised, resulting in unambiguous risk reductions. Results also suggests that if the market would be extended to several irrigation districts and users, each characterised by different hydrological risk exposure, the occurrence of extremely low benefits events would become more unlikely. In sum, it is shown that exchanging water in annual spot markets allows for the reduction of farmers’ economic vulnerability caused by the variability of water supply across irrigation seasons.
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Опубликовано на портале: 30-11-2003
Rhung-Jieh Woo, Hsin-Yeh Tsai
2003
Chrysanthemum is the primary flower Taiwan exports. However, the exports showed decreasing trend in recent years. The volumes exported were 826,596 kilograms in 2001, and Japan was the major market. About 99% of the chrysanthemum exports went to the Japanese market. Quarantine procedure is one of the measures Japanese government adopts to protect its domestic agricultural production. When chrysanthemum exports fail to pass the quarantine procedure, fumigation is required. According to statistics, the fumigated rate for Taiwan.s chrysanthemum exports to Japan reached 90Ѓ“ during 1996-1997, and was 70% in 1998. Fumigation could damage the quality and the reputation of Taiwan.s chrysanthemum exported. However, the degree of strictness of quarantine applied to the exports varied from time to time, hence caused the chrysanthemum exports facing with trade uncertainty. In addition, quality unevenness of exports, or standards that are not uniformly enforced could also cause trade uncertainty (not all exports are allowed to enter into the importing market).

It is suspected that the strictness of quarantine of a certain commodity is influenced by the domestic market conditions of supply and demand in Japan. During the seasons when Japan can produce enough chrysanthemum domestically, Japan might take stricter quarantine procedure to prevent foreign chrysanthemum exports from entering the Japanese domestic market. Trade uncertainty hence increased since not all of the amount exported each time is allowed to enter into Japan.s chrysanthemum market.

Since global agricultural trade liberalization is an unavoidable trend, non-tariff trade barriers are to be disciplined, it is expected that trade uncertainty of chrysanthemum trade between Taiwan and Japan will be reduced gradually during the process of agricultural trade liberalization in Japan.

The main objective of this study is to explore the possible influences of reducing trade uncertainty of chrysanthemum trade between Taiwan and Japan through quantitative analyses.
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Опубликовано на портале: 30-11-2003
Mona Sur, Dina Umali-Deininger
2003
Public investments in surface irrigation in India have been important in generating agricultural growth and in reducing the threat of poverty and food insecurity. The expansion of irrigation infrastructure and subsidized delivery of irrigation water, along with improved fertilizers and agro-chemicals, facilitated the rapid diffusion of modern high yielding varieties of crops. Irrigation also led to increases in cultivated area, higher cropping intensities and shifts in cropping patterns to higher value-added crops. Water from surface irrigation systems has provided additional benefits as a source of drinking water supply, and in generating power, for industry and residential consumers. Over time the costs of providing and expanding surface irrigation have increased but revenues from irrigation have fallen short of expenditures. The accumulation of financial losses in the irrigation sector has contributed to mounting fiscal crises in Indian states (World Bank 1997, World Bank 2000a,b, World Bank 2001b, World Bank 2003a, Gulati and Sudnarayan 2003) Limited irrigation revenues have also resulted in inadequate expenditures on operation and maintenance (O&M), contributing to the deterioration of existing irrigation infrastructure. Furthermore, the under-pricing of surface irrigation water has encouraged inefficient use, contributing to environmental problems including salinity and waterlogging (Joshi and Tyagi 1995, World Bank 1999, Gulati and Sudanarayan 2003). The social justification of the subsidies are also increasingly debated, particularly how these subsidies are distributed across the population and whether they benefit the poor. The equity consequences of public surface irrigation subsidies are the focus of this paper. Understanding the equity dimension of these subsidies in public surface irrigation systems2 is important not only in determining whether the subsidies benefit the poor, but also in providing policy directions in designing cost-recovery strategies. In order to minimize or eliminate any adverse impacts of cost recovery measures on poor and vulnerable groups, it is necessary to identify how the various users of irrigation water are affected. This paper is organized as follows. Section 1 reviews the structure of surface irrigation charges and the trends in irrigation expenditures and revenues in India. Section 2 discusses the measurement of irrigation subsidies and the data. Section 3 examines the incidence of surface irrigation subsidies and section 4 summarizes the magnitude of these subsidies. Section 5 elaborates the policy implications of the findings of the study.
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Опубликовано на портале: 28-11-2003
Maria Raquel Ventura-Lucas, Maria de Lurdes Ferro Godinho, Rui Sousa Fragoso
2002
Sustainable agriculture implies the exploitation of natural resources now, without compromising the natural resources stocks for the future generations. In the context of the paper, agricultural sustainability takes place at the interface between agriculture and the environment. The focus is on the interplay between farming systems and agrienvironmental policies. Agricultural policies have major impacts on soil and water quality and on bio-diversity. Support commodity price policies have lead to serious problems of water pollution; high levels of soil erosion; nitrate losses and lost of biodiversity. The semi decoupeted income support policies and the introduction of the agrienvironmental schemes under the 1992 CAP reform were the first attempts to correct the negative aspects of the production-orientated policies. For the first time farmers were regarded as countryside and landscape keepers and as environmental conservationists. Under the 2000 Agenda similar emphasis was given to the sustainability of agriculture. The objective of this paper is to evaluate the impact of the different agri-environmental policies on typical farming systems and consequently their effects on water pollution, soil erosion and bio-diversity/landscape. A bio-economic model, integrating a mathematical programming model and crop growth simulation model, is applied to estimated the changes in the levels of nitrogen leaching and soil erosion, and in the degree of bio-diversity under the current and proposed agricultural policy scenarios. The following farming systems are studied: dry land cereal farming systems (intensive and extensive), livestock and irrigated farming systems using conventional and conservation farming technologies. The results show The results show that the main changes on water pollution, soil erosion levels and biodiversity are mainly due to changes in price and arable compensatory payments. The agri-environmental measures are more important as farm income source than as a policy instrument to influence environmental parameters.
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Опубликовано на портале: 30-11-2003
Rosa Gallardo, Fernando Ramos, Eduardo Ramos
2002
The evolution of the Common Agricultural Policy (CAP), and its successive Reforms, has caused a loss of both internal coherence and social legitimacy. On the other hand, the Agenda 2000 has situated agriculture within the objective of competitiveness. What may well be asked is whether indeed the different European agricultural systems are converging towards this objective of competitiveness. To be able to reply to this question it is necessary to change from a “meso” analysis of the CAP to a “micro” analysis of farms referring to specific regions.

Starting from this context and problem, this paper analyses how the agriculture of the region of Andalusia can be affected by the competitiveness approach in an area which is in an advanced process of modernization but nevertheless maintains a strong agricultural character and a dependence on the CAP. For this analysis, we have started from the fact that farmers make strategic decisions so as to adapt to a changing political situation. The main objective of this work is to contrast the importance of a combination of structural and strategic variables to explain the differences in the competitive position of agricultural systems compared with different situations of the CAP. In order to achieve this objective, analytical instruments of competitive and strategic approaches, normally designed for individual enterprises in other economic sectors, have been used, adapting them to the agricultural system as a whole. The results allow the affirmation that the farmers who obtain the best competitive positions are those who adopt a strategic position concerning their activity, with a greater coherence between the definition of their objectives and of the resource allocation strategies they design in order to achieve them.
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Опубликовано на портале: 29-11-2003
Rakhal Sarker, Yves Surry
2002
Since the early 1990s, researchers have routinely used count data models (such as the Poisson and negative binomial) to estimate the demand for recreational activities. Along with the success and popularity of count data models in recreational demand analysis during the last decade, a number of shortcomings of standard count data models became obvious to researchers. This had led to the development of new and more sophisticated model specifications. Furthermore, semi-parametric and non-parametric approaches have also made their way into count data models. Despite these advances, however, one interesting issue has received little research attention in this area. This is related to the fast decay process of the dependent variable and the associated long tail. This phenomenon is observed quite frequently in recreational demand studies; most recreationists make one or two trips while a few of them make exceedingly large number of trips. This introduces an extreme form of overdispersion difficult to address in popular count data models. The major objective of this paper is to investigate the issues related to proper modelling of the fast decay process and the associated long tails in recreation demand analysis. For this purpose, we introduce two categories of alternative count data models. The first group includes four alternative count data models, each characterised by a single parameter while the second group includes one count data model characterised by two parameters. This paper demonstrates how these alternative models can be used to properly model the fast decay process and the associated long tail commonly observed in recreation demand analysis. The first four alternative count data models are based on an adaptation of the geometric, Borel, logarithmic and Yule probability distributions to count data models while the second group of models relied on the use of the generalised Poisson probability distribution. All these alternative count data models are empirically implemented using the maximum likelihood estimation procedure and applied to study the demand for moose hunting in Northern Ontario. Econometric results indicate that most of the alternative count data models proposed in this paper are able to capture the fast decay process characterising the number of moose hunting trips. Overall they seem to perform as well as the conventional negative binomial model.and better than the Poisson specification. However further investigation of the econometric results reveal that the geometric and generalised Poisson model specifications fare better than the modified Borel and Yule regression models.
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Опубликовано на портале: 30-12-2003
Marcel Fafchamps, Bart Minten
Durban, 2003
This paper investigates the relationship between theft and poverty in rural areas. Following a disputed presidential election, fuel supply to the highlands of Madagascar was severely curtailed in early 2002, resulting in a massive -- if temporary -- increase in poverty. This situation constituted a natural experiment of the effect of poverty on theft. Using original survey data collected in June 2002 at the height of the crisis, we find that crop theft increases with poverty and that an increase in law enforcement personnel reduces cattle theft, a form of organized crime. Results suggest that theft is used by some of the rural poor as a risk coping strategy. Increased transport costs led to a rise in cattle and crop theft, suggesting that isolation raises crime.
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Опубликовано на портале: 29-11-2003
Javier Guillem Carrau, Raul Compes Lopez
2002
The United States is the leading country in the application of biotechnology to agricultural methods. One of the principal reasons for this is the flexibility of its legislation on Genetically Modified Organisms (GMO). A significant part of its production of soya or corn is already genetically modified, so that its companies need to avoid technical barriers to their exports in the world markets?. In the EU, negative public opinion has contributed to the adoption by the authorities of exigent legislation in order to avoid the possible risks to human health and the environment posed by GMO. The EU’s authorisation procedure for these organisms is long and meticulous.

Furthermore, a compulsory labelling system has been adopted for products, which contain GMO or genetically modified materials (GM materials). In 1998, American interests started to be adversely affected by European legislation. The USA Administration threatened to sue the EU before the World Trade Organisation (WTO). These threats have yet to be followed up with any action. The rules of international trade are regulated by agreements signed up to by the members of the WTO. The EU can argue that its authorisation procedure is designed to reduce the risks to health and the environment. This line of argument is compatible with the Agreements on Sanitary and Phytosanitary Measures (SPS) and Technical Barriers to Trade (TBT). The compulsory labelling system is also compatible with the Agreement on TBT if the WTO accepts that a product in which GM material is detected is not similar to a conventional one. The Protocol of Biosafety further supports the EU position since it advocates a cautious approach exemplified by the fact that the Protocol permits consideration of non-scientific risks during risk assessment. However, the Protocol is not yet in force, it is pending ratification by at least 50 countries and, now more than ever, it is uncertain whether the United States will be willing to ratify the Protocol. However, we cannot be sure that there will be future commercial controversy, which will show the contradictions between the commercial agreement and the environmental one.
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Опубликовано на портале: 30-12-2003
Tim Lloyd, Steve McCorriston, Wyn Morgan, Tony Rayner
Durban, 2003
This paper is concerned with the impact of the BSE crisis in the UK and focuses on price transmission between retail and farm prices. From a theoretical perspective we show that market power has an effect on price transmission between retail and farm prices following a demand shock. The empirical results suggest that the impact of a food scare on farm prices to be more than double that of retail prices, the direction of this effect being consistent with the impact of oligopoly dominating the effect (if any) of oligopsony.

However, important in assessing the full impact of a food scare is the ability of consumers to switch into substitute products. This is also evident following the BSE crisis with the availability of substitutes contributing significantly to the overall impact on price adjustment.
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Опубликовано на портале: 24-12-2003
Katinka Weinberger
Durban, 2003
Micronutrient malnutrition, particularly of iron, is widespread on the South Asian subcontinent and economic losses due to reduced productivity of afflicted population groups are believed to be substantial.

This paper examines the impact of micronutrient intake on productivity of household engaged in agricultural labor in India by applying a two-stage least squares (2SLS) estimation technique. The micronutrient under investigation is iron. The results indicate that productivity, measured in wages is indeed affected through insufficient intake, and that wages would on average be 5 to 17.3 percent higher, if households would achieve recommended intake levels of the micronutrient discussed here. The results demonstrate that policy interventions that aim at enhancing micronutrient intake can be regarded as investments in improved productivity and higher household incomes. Enhancing micronutrient intake will contribute significantly to overall economic growth and development.
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