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Всего публикаций в данном разделе: 352

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:
А БВ ГДЕЖЗИЙКЛМНОП Р СТУФХЦЧШЩЭЮЯ
A BC D E F G H I JKL M N O P Q R S T U V W XY Z
 

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: 24-12-2003
Gerald Schluter, Chinkook Lee
Durban, 2003
Rapid developments in E-commerce can bring efficiency in the food market system by cutting transaction costs. However, it can also bring a battleground between developed and developing countries and also within developed countries because the New Economy emphasizes knowledge-based labor practices and low-skilled workers of trading nations compete for a shrinking need for their services. An Input-Output model is used to examine the effects on high-skilled and low-skilled worker demand, particularly in food and agriculture. The food and agriculture industries are significant employers of low-skilled labor. Food and agriculture trade has reduced low-skilled labor demand in the United States.
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Опубликовано на портале: 29-03-2005
Erwin Schmid
2004
The aim of this paper is to analyse the question whether the recent Common Agricultural Policy (CAP) reform is counter-productive to the objectives of the rural development programme or alleviating the attainment of its objectives. Austria is chosen as a case study because i) the rural development programme is more important than commodity policies as measured by total transfers, and ii) agricultural services and inseparable secondary activities have a relatively large share on total agricultural sector output. An agricultural sector model is presented that captures core features of the rural development programme including: a) broad regional, structural and activity differentiation, b) sufficient coverage of programme components (in particular agri-environmental measures), and c) secondary activities addressed by the programme. Simulation results show that the recent CAP reform will reduce the cost of production, lessen environmental harm and make the programme for rural development more attractive for farmers.
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Опубликовано на портале: 12-12-2003
Eduardo Segarra, Daniel G. de la Torre Ugarte, Jaime Malaga, Gary W. Williams
Durban, 2003
A non-linear optimization model which maximizes total Ecuadorian social welfare, defined as the sum of Consumers’ and producers’ surpluses for the four major crops (corn, bananas, rice and African palm) is developed to evaluate the tradeoff between welfare and environmental degradation in Ecuador. It was found that a total welfare loss of US$122 million (a 11 percent reduction - from US$ 1.112 billion to US$ 989.66 million) would be expected from a 30 percent reduction in the total pesticide load on the environment in the production of the four major crops. The distributional impacts of the welfare loss were found, however, to be significantly skewed toward the loss of consumers’ surplus. Specifically, a 30 percent reduction of total pesticide load on the environment would result in a reduction of 3.86 percent of producers’ total surplus while consumers would be expected to loose 19.46 percent of their total surplus.
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Опубликовано на портале: 30-11-2003
Bekele Shiferaw, Stein Holden
2003
The paper examines the interlinkages between population pressure and poverty, possible impacts on household welfare and land management, and the consequent pathways of development in a low potential rural economy. A dynamic non-separable bio-economic model, calibrated using data from the Ethiopian highlands, is used to trace key relationships between population pressure, poverty and soil fertility management in smallholder agriculture characterized by high levels of soil degradation. Farm households maximize their discounted utility over the planning horizon. Land, labor and credit markets are imperfect. Hence, production, consumption and investment decisions are jointly determined in each period. The level of soil degradation is endogenous and has feedback effects on the stock and quality of the resource base. This may in turn influence land management choices. Under high population pressure, land becomes dearer relative to labor. This is likely to induce conservation investments, especially when conservation technologies do not take land out of production. When markets are imperfect, poverty in vital assets (e.g., oxen and labor) limits the ability or the willingness to invest in conservation and may lead to a less sustainable pathway. Boserup-type responses are more likely when (privately) profitable technologies exist and market imperfections do not limit farm-households' investment options.
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Опубликовано на портале: 30-11-2003
Giovanni Signorello, Gioacchino Pappalardo
2002
In this paper we report on preliminary results of a research aimed to examine the content of farm animal biodiversity conservation actions currently under implementation in the European Union in the framework of EU Agenda 2000. In particular, we surveyed sixty-three Rural Development Plans (RDPs) set up in twelve countries in application of EEC regulations 1257/99 and 1750/99. Our analysis focused on endangered breeds of six major livestock species included in the RDPs. This analysis, which is based on the comparison with the indicator’s status of the DAD-IS FAO database, allowed to identify priorities in conservation efforts in each country, and estimate the level of expected public expenditure needed to ensure the moving of breeds from at-risk (of extinction) status to not-at-risk status over the period 2000-2006.
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Опубликовано на портале: 29-03-2005
Franz Sinabell, Герхард Штрейхер
2004
Community legislation requires that the programme for rural development is evaluated. A detailed set of indicators was developed by the commission and member states are required to use them to measure program success. To make results comparable requires that the methodology by which indicators are measured is well defined. However, this is not the case in this evaluation task. We take a small set of indicators and use two different approaches using the same sample and show that the results are deviating. We conclude that the success of this programme can only be compared across measures/regions when both, indicators and method are the same.
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Опубликовано на портале: 29-11-2003
Louis H.G. Slangen, Cornelis G. van Kooten, Pavel Suchanek
2002
The agricultural sector in Central and Eastern Europe (CEE) is confronted by two huge problems simultaneously: transition processes and sustainability. Institutions are very important for both these problems. The purpose of this paper is to make clear that the institutional setting is very important, and to give insight into the initial situation of institutions for sustainability and transitions. For this purpose we carried out surveys in CEE with questions about government performance, institutional environment, government structures and social capital. There is strong relationship between the determinants of good government performance in general and those for good government for realizing sustainable agriculture. However, besides formal rules, the informal rules of the institutional environment and social capital are also very important for realizing of sustainable agriculture. Results of surveys show that these institutional elements and the level of social capital are different in the countries of CEE, and have to be developed. Knowledge of government performance, institutional environment and social capital is a necessary condition for developing more suitable governance structures for realizing sustainable agriculture.
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Опубликовано на портале: 04-01-2004
Melinda Smale
Berlin, 2000
This paper organizes evidence on the problem of in situ conservation for rice, wheat, and maize around the decision-making criterion of the minimum viable reserve (Krutilla, 1967). Put simply, Krutilla argued that while technological change can compensate for the depletion of some stocks, amenities that members of post-industrial society (and developing societies) consume may be lost. Acknowledging that too little was known about the instrumental variables in this dynamic problem, he recommended the identification, based on scientific assessments, of a minimum reserve. He argued that these reservations should meet not only scientific purposes but also the demand for “esoteric” or recreational consumer tastes, such as the enjoyment of the existence of a grand scenic wonder. Similarly, though modern biological techniques can in some instances modify the size of the crop genetic resource stock, proponents of in situ conservation of cultivated crops would argue that certain alleles may be lost as the spatial pattern of crop varieties grown in the fields of the world’s farmers changes with economic development. Furthermore, some food-related amenities around which culture is now defined in local communities and “esoteric” (luxury) food attributes for which consumers in post-industrial societies could eventually be willing to pay may also disappear.
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Опубликовано на портале: 29-11-2003
Sinne Smed, Jorgen Dejgaard Jensen
2002
This paper examines the cross-impacts of food safety news concerning one product on the demand for another product, using the Danish demand for pasteurized eggs versus shell eggs as an illustrative case. The study identifies news with a temporary impact and news with a permanent impact on consumers’ food demand behavior. The techniques used to identify the permanent versus temporary news are recursive estimation and parameter stability. Whereas “permanent” news is identified to be represented by a specific individual event, “temporary” news concerning salmonella in eggs is aggregated into a news-index variable. Both temporary and permanent news concerning salmonella in shell eggs appear to have significant positive impacts on the demand for pasteurized eggs. The model is estimated as an Error Correction Model. Consumers are found to adjust quite rapidly to both temporary and permanent news. Both the composition of egg consumption accounted as mean budget shares varies across socio-demographic household groups as well as the impact of the considered permanent news.
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Опубликовано на портале: 29-11-2003
Ann-Christin Sorensen, Berit Tennbakk
2002
We have employed a simple model to analyse market regulation in a situation with multifunctional agricultural production, i.e., a public good produced jointly with a private good, and where there is imperfect competition in processing. We have analysed the impact on welfare of two archetype regulatory institutions formed to overcome the market imperfections. The institutions, a Regulatory Marketing Board and a Regulatory Marketing Cooperative, are both represented in the Norwegian agricultural market. Taking into account the cost of public funds, we find that the Board in general ensures the highest social welfare. The Cooperative does not replicate the Board solution unless restricted by a price cap and in combination with a production subsidy. If the restricted Cooperative is able to practise a higher degree of cost sharing than the Board, it may however produce the highest welfare.
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