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Всего публикаций в данном разделе: 78

Авторы:
все А Б ВГ Д Е ЖЗИ ЙК Л М Н О П Р С Т У ФХ ЦЧ Ш ЩЭЮЯ
A B C D E F G H I J K L M N O P Q R ST U V W X Y Z
 
Названия:
А БВ Г Д ЕЖЗ И ЙК ЛМ Н О П Р С Т У ФХЦ ЧШЩЭ ЮЯ
A B C D E F G H I JKL M N O P Q R S T U V W XY Z
 

Опубликовано на портале: 31-12-2003
Emily A. Ouma, Gideon A. Obare, Steven J. Staal
Durban, 2003
This paper uses data from a survey of two hundred and fifty cattle keeping households in three cattle keeping systems; intensive, semi-intensive and extensive systems to estimate the value of non-market, socio- economic benefits of cattle in Kenya. These benefits of cattle keeping are of special importance in developing countries, where financial markets function poorly and opportunities for risk management through formal insurance generally absent. However, when estimating the total contribution of livestock, these non - market functions are often ignored since they are difficult to value, yet they may contribute to a better understanding of livestock production systems. The use of contingent valuation method is employed in this study to elicit these non-market values. Econometric estimations are then used to assess the factors influencing the non - market benefits function. The results indicate that these benefits are highly valued by cattle keepers and comprise approximately 20% of the animal.s total value across the three systems. They are influenced by various production system and household related factors. Implications for policy are drawn.
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Опубликовано на портале: 12-12-2003
John Pender, Ephraim Nkonya, Pamela Jagger, Dick Sserunkuuma, Henry Ssali
Durban, 2003
This paper estimates a structural econometric model of household decisions regarding income strategies, participation in programs and organizations, crop choices, land management, and labor use, and their implications for agricultural production and land degradation; based upon a survey of over 450 households and their farm plots in Uganda. The results generally support the Boserupian model of population-induced agricultural intensification, but do not support the .more people-less erosion. hypothesis, with population pressure found to contribute to erosion in the densely populated highlands. Agricultural technical assistance programs have location-specific impacts on agricultural production and land degradation, contributing to higher value of crop production in the lowlands, but to soil erosion in the highlands. By contrast, NGO programs focusing on agriculture and environment are helping to reduce erosion, but have mixed impacts on production. We find little evidence of impact of access to markets, roads and credit, land tenure or title on agricultural intensification and crop production, though road access appears to contribute to land degradation in the highlands. Education increases household incomes, but also reduces crop production in the lowlands. We do not find evidence of a poverty-land degradation trap, while poverty has mixed impacts on agricultural production: smaller farms obtain higher crop production per hectare, while households with fewer livestock have crop production. These findings suggest that development of factor markets can improve agricultural efficiency. Several other factors that contribute to increased value of crop production, without significant impacts on land degradation, include specialized crop production, livestock and nonfarm income strategies, and irrigation. In general, the results imply that the strategies to increase agricultural production and reduce land degradation must be location-specific, and that there are few .win-win. opportunities to simultaneously increase production and reduce land degradation.
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Опубликовано на портале: 29-11-2003
Albino Prada, Jose Manuel Gonzalez, Maria Xose Vazquez, Mario Solino
2002
This article presents results from an experiment into attribute perception and relevant levels for management of woodland and mountain areas typical of the Iberian Peninsula's Atlantic region. The aim, which the authors argue has been robustly reached, was to identify those aspects of forestry policy clearly perceived by citizens. This is useful for defining enlargement of areas protected under Natura 2000 Network. Results show clear preference for an increase in woodland to over half the current surface area, with replanting of traditional trees, in woodlands of low density and trees of different age and, preferably in irregular shaped plots.
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Опубликовано на портале: 30-12-2003
Nataliya Pustovit, P. Michael Schmitz
Durban, 2003
Agricultural protection in industrialized countries and price distortions in developing countries are accused to hamper economic and agricultural development and are partly responsible for poverty and hunger in the Third World. A multi-commodity multi-country comparative static trade model is used to simulate the impact of different policy scenarios in this typical second best world for the case of South Africa.

Special emphasis is given to the disincentive effect of production and to endogenous policy responses in South Africa. In conclusion South Africa could benefit a lot by liberalizing trade and agricultural policies world wide, although it is an importer for most of the considered commodities.
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Опубликовано на портале: 29-11-2003
Emmanuelle Raynaud, Loic Sauvee, Egizio Valceschini
2002
For many agricultural products, the quality of the final products strongly depends on different stages of the productive chain. This stresses the importance of relationships between quality signal owners and suppliers in the vertical chain. Based on a New Institutional Economics analysis, the goal of this paper is twofold:
(i) to design a framework to study the links between quality signaling, coordination in the supply chains and the institutional environment,
(ii) to conduct a comparative analysis to identify, compare and explain the modes of organization implemented for the governance of different quality signs.
The general hypothesis is that, in order to assure the credibility of a quality signal, there must be an efficient alignment between quality characteristics and governance of the supply chain. To test this general hypothesis, we have conducted a comparative analysis of 42 case studies in 3 sectors (processed meat, cheese, fruit and vegetable sectors) from 7 European countries. This diversity allows us to compare the organizations designed to govern different quality signals in different institutional environments and to test the matching between quality signals and governance structures.
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Опубликовано на портале: 30-11-2003
Arjan Ruijs, Caspar Schweigman, Clemens Lutz
2003
Reductions in transport and transaction costs are expected to have a major effect on the functioning of food markets in developing countries. For many developing countries, this is a relevant issue as it may have important consequences for the food markets in urban and rural deficit areas. A partial equilibrium model is presented to analyze the effects of reduced costs on cereal price formation, inter-regional cereal trade, and farmers' and traders' storage strategies for the case of Burkina Faso. Our results show that the high expectations with regard to the direct effects of cost reductions on food prices and food availability require some nuance. First, the effects of even a huge reduction of transport costs only will be small. Secondly, an element which is often neglected is that constructing a road between two cities may have unintended negative consequences on the competitive position of farmers and traders in other regions. Finally, it is concluded that only if transport and transaction costs are reduced simultaneously, both consumers and farmers will benefit significantly.
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Опубликовано на портале: 29-11-2003
Carlo Russo, Massimo Sabbatini
2002
In this paper, equity management practices of Italian agricultural cooperatives are described and discussed. Financial statements of 1.483 cooperatives are analyzed in order to provide empirical support to the study. Data confirm cooperative undercapitalization and disclose the existence of diversity in equity management practices even within the same business sector. Thus, in order to highlight the relations between cooperative market strategies and equity management practices a cluster analysis is proposed. Seven main strategic approaches for Italian cooperatives are identified and the emerging equity management practices are discussed. The empirical analysis supports the conclusion that a large number of Italian are implementing “perverse” approaches, such as dependence from public funding and minimization of equity and investments. Considering increasing competition, without an innovative equity management approach, the majority of the analyzed cooperative is expected to suffer of relevant competitive disadvantage.
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Опубликовано на портале: 31-12-2003
Klaus Salhofer, Erwin Schmid, Герхард Штрейхер, Friedrich Georg Schneider
Durban, 2003
The study evaluates the efficiency of government intervention using a vertical structured model including imperfectly competitive agricultural input markets, the bread grain market, and the imperfectly competitive food industry. To test for policy efficiency the actually observed bread grain policy is compared to a hypothetical efficient policy. To account for the sensitivity of the results in regard to the model parameter values computer-intensive simulation procedures and surface response functions are utilized.
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Опубликовано на портале: 31-03-2005
Klaus Salhofer, Герхард Штрейхер
2004
Since participation in agri-environmental programmes is voluntary, associated with opportunity costs (most of these programmes aim at reducing output), and financial compensation for participation is typically a fixed amount per hectare, a tendency is likely to arise for some sort of self selection: farms in favourable regions which face high opportunity costs from foregone output are less likely to participate than other, more disadvantaged farms. When trying to estimate the effects of such programmes on agricultural output, this self-selection bias can pose severe problems, as a direct comparison of participants with non-participants is likely to lead to erroneous results. This paper tries to highlight the effects of this self-selection process in the context of the Austrian OEPUL programme and its effects on grain yields. After identifying various sources of this problem, some possible remedies are presented and discussed. The empirical analysis is based on farm-level accounting data linked with the official agricultural support data (INVEKOS) for a sample of 1327 Austrian grain farms. Two years of data before (1993 and 1994) and one year (1997) after EU accession are utilized to estimate programme effects on grain yields.
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Опубликовано на портале: 31-03-2005
Elena Saraceno
2004
This paper tries to bring together the various arguments that make a reform of rural development policies desirable and useful for the stakeholders involved. The policy implications of a desirable reform are also considered. CAP, in its long story has established powerful interest groups in the administrations, in the sector and even in expert’s circles. Past shortcomings of reform attempts suggest that a consensus on reform is difficult to achieve and requires a clear and shared outline of what will agricultural and rural policy look like after the reform process. A transition period, the inclusion of wider interest groups than those directly concerned by the policy, the possibility of regionally adapted versions rural policy appear to be important components for insuring a strengthened support and a more effective policy.
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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: 30-11-2003
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: 24-12-2003
Caroline Saunders, Anita Wreford
Durban, 2003
This paper focuses on the impact of mitigating greenhouse gases (GHG) on agricultural trade. In particular, the paper assesses the impact on New Zealand (NZ), which is highly reliant on agricultural trade, with a high percentage of its total GHG emissions are originating in the agricultural sector. The paper also analyses the impact of mitigation strategies in the European Union (EU), which has a low proportion of GHG coming from agriculture, a highly protected agriculture sector, and is a major market and competitor for NZ. Results from a partial equilibrium trade model, the LTEM, show clearly that while these mitigation strategies achieve the goal of GHG reduction, producer returns are also negatively affected. The value of these changes in emissions are then calculated, based on US$15/tonne of carbon dioxide (CO2), and producer returns adjusted for this. Although this value of CO2 goes some way towards offsetting the reduction in producer returns, it would need to be considerably greater in order to provide any significant compensation.
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Опубликовано на портале: 31-03-2005
Riccardo Scarpa, Laura Viganò, Davide Bortolozzo
2004
A farmer’s choice to part-take into an on farm investment programme can be modelled as a discrete choice. The idea of this paper is to test the possibility of using discrete choice models in the field of the evaluation of structural policies. Farmers choose to take part into agricultural programmes according to their preferences, their structural type and their economic environment. Adhesion to a voluntary scheme or policy can be cast as a discrete choice problem. Hence, discrete choice models are adequate to describe probability of choice, especially against a framework of utility maximization. First, we want to explore if the choice of investing in schemes supported by EAGGF depends on farms’ characteristics, such as Used Agricultural Area, Standard Gross Margin, Farm type, Possession of lands, Form of Farm Management, Standard Work Unit, class of European Size Unit, Fixed costs, etc.. We use is the binomial logit model to explain the probability of making an on-farm investment with regard to Italian Central and Northern Regions. The estimation of such a model allows us to identify the determinants of such a decision. We also use discrete choice analysis to identify the significant determinants of the probability of selection of on-farm investment across 12 investment categories within the Regulation (EC) No 950/97. These include – amongst others – land purchase, system for refusal treatment, land improvement, agricultural machinery, agricultural and non-agricultural farm buildings, land improvements, permanent cultivations etc. We find such an approach to be insightful on the basis of data from the Italian RICA business farm survey, and hence propose to develop it further.
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Опубликовано на портале: 25-01-2003
Frederick M. Scherer, David Ross
Москва: Инфра-М, 1997
Фундаментальная книга по отраслевой организации, которая считается учебником, хотя напоминает монографию (на первое английское издание очень много ссылок в научной литературе). Книга написана свободным ясным языком. Обсуждение скорее вербальное и графическое, чем формальное. Плюсы книги - хорошая формулировка теоретических проблем и богатая библиография, недостатки - отсутствие учебных атрибутов (вопросы, задачи).