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Всего публикаций в данном разделе: 41

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
ABC D E F G H I JKL M N O P Q R S T U V W XY Z
 

Опубликовано на портале: 29-11-2003
Tassew Woldehanna, Arie Oskam
2002
There is some confusion in the literature on the consumption behaviour of farmers. We try to clear up some of the issues surrounding this confusion by elaborating and testing a model. Euler equations have been derived from a constant relative risk aversion utility function for total consumption expenditure, household expenditure and other expenditure, which includes durable goods. According to a test of Euler equations, farm households are not simply optimising lifetime utility. Rather, these households follow simple consumption rules, strongly influenced by habit formation. In line with most of the literature, we find that farm households are not borrowing constrained in their consumption expenditures.
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Опубликовано на портале: 29-03-2005
Andrea Bonfiglio, Emilio Chiodo
2004
The objective of this paper is to evaluate the overall impact produced by the application of European development policies for rural areas of the Italian Marche region for the period 2000-2003. Towards this aim, the input-output approach is adopted. A Marche regional I-O table is firstly constructed using a hybrid method. To evaluate the overall impact throughout the territory, two models are developed and applied recursively: an interregional I-O model and a gravity model. As for the former, sub-interregional I-O tables are constructed, where the regions under study are, on one hand, the functional area receiving funds and, on the other hand, the rest of the Marche region. The gravity model is instead used to allocate among the other areas the impact calculated for the rest of the region. To show how the impact is distributed among regional areas, a Geographical Information System is used. The paper concludes illustrating the main results in terms of overall impact generated by policy and providing some considerations related to policy effectiveness.
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Опубликовано на портале: 30-11-2003
Rajeev Ahuja, Johannes Jutting
2003
Community based micro insurance has aroused much interest and hope in meeting health care challenges facing the poor. In this paper we explore how institutional rigidities such as credit constraint impinge on demand for health insurance and how insurance could potentially prevent poor households from falling into poverty trap. In this setting, we argue that the appropriate public intervention in generating demand for insurance is not to subsidise premium but to remove these rigidities (easing credit constraint in the present context).

Thus from insurance perspective as well, our analysis highlights the importance of having appropriate savings and borrowing instruments for the poor.
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Опубликовано на портале: 30-11-2003
Ulrich Koester
2003
In contrast to expectations held by western observers in 1990, the farm structure in the Central and Eastern European Countries and the Countries of Independent States has not converged to the one prevailing in the West. In particular, remarkable changes in Russian agriculture in recent years have let to the emergence of new agricultural holdings combining under one umbrella many large farms. Does this unexpected development, unprecedented even in the West, contradict conventional wisdom about the determinants of farm size in agriculture? This paper argues that in transition economies external institutions seem to be more important than economies of scale and transaction costs on the farm in determining farm size. Whilst the birth of family farms in Russia seems to have been mainly constrained by embedded institutions of could-be family farmers and partly by second level institutions, the survival and the creation of holdings has been strongly supported by second and third level institutions, but embedded institutions have played also a role. Consequently, recent developments in Russia do not support the view that large farms or even holdings are more efficient than small or medium size family farms in an environment, which prevails in western market economies.
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Опубликовано на портале: 29-11-2003
Christos Pantzios, Stelios Rozakis, Vangelis Tzouvelekas
2002
Utilizing the stochastic frontier approach, this paper estimates output and input-oriented technical and scale efficiency levels for a sample of cotton-growing farms in Thessaly, Greece. The empirical results suggest that Greek cotton farm operations are technically and scale inefficient. There is a considerable scope for improvement in resource use and thereby in farm income of cotton farms; Greek cotton farmers could reduce production costs by 20.4%, making more efficient utilization of the existing production technology. Factors responsible for the technical efficiency differentials observed among cotton-growers include the farmer’s age and education as well as the farm’s land fragmentation and output specialization.
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Опубликовано на портале: 30-11-2003
Chittur S. Srinivasan
2003
Many developing countries are attempting to address the inequities of plant breeders' rights by incorporating farmers' rights provisions in their Plant Variety Protection legislations to reward the role of farmers as conservers and enhancers of agro-biodiversity. Developing countries expect to generate substantial revenues for biodiversity conservation or for community reward schemes through the application of farmers' rights provisions. This paper applies a patent-renewal model to assess the economic returns appropriated by plant breeders from new (protected) varieties in developed countries. The estimates confirm a widely held view in the literature that plant variety protection is a relatively weak form of IPR protection which allows plant breeders to appropriate only limited returns from their innovations. Consequently, the application of farmers' rights provisions in a manner akin to breeders' rights is unlikely to be a source of significant revenue to developing countries.
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Опубликовано на портале: 30-11-2003
Ernst Berg
2002
This paper investigates the farm level impacts of multiple peril yield and revenue insurance in an expected value-variance framework. The analysis is conducted using stochastic simulation jointly with numerical optimisation. Simulation is used to compute the means and variances of revenues as affected by the insurance schemes under consideration. In a second step these results are incorporated in a whole-farm programming approach, which optimises a portfolio that consists of crop production and insurance activities. The results of a case study indicate that from the farmer's point of view there is an incentive to buy multiple peril crop insurance, because it significantly reduces the variability of income. The risk reduction through insurance in turn leads to a specialisation of the production program. The farm level benefit of crop insurance strongly depends on the decision maker's degree of risk aversion. Furthermore, risk free parts of the total income reduce the economic attractiveness of insurance schemes. This applies e.g. to the area payments under the European agricultural policy, which therefore limit the potential demand for crop insurance.
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Опубликовано на портале: 30-11-2003
Gudbrand Lien
2002
Stochastic budgeting is used to simulate the business and financial risk and the performance over a six-year planning horizon on a Norwegian dairy farm. A major difficulty with stochastic whole-farm budgeting lies in identifying and measuring dependency relationships between stochastic variables. Some methods to account for these stochastic dependencies are illustrated. The financial feasibility of different investment and management strategies is evaluated. In contrast with earlier studies with stochastic farm budgeting, the option aspect is included in the analysis.
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Опубликовано на портале: 04-01-2004
Julian Binfield, Gary Adams, Robert Young, Patrick Westhoff
Zaragoza, 2002
Most of the large scale modeling systems used in the analysis of agricultural policies produce deterministic projections. In reality, however, the agricultural sector is subject to a high degree of uncertainty as a result of fluctuations in exogenous factors such as the weather or macroeconomic variation. A stochastic approach can provide additional information to policy makers regarding the implications of this uncertainty, through the use of stochastically generated projections.

This paper also shows how deterministic analysis may result in systematic errors in the projection of some variables. As an applied example, the FAPRI model of the US agricultural sector is simulated stochastically to analyse the impact of proposals for the new US farm bill.
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Опубликовано на портале: 29-11-2003
Stephan Cramon-Taubadel, J. Meyer
2002
In this paper we survey the literature on asymmetric price transmission. This literature contains a substantial share of publications by agricultural economists. After classifying the different types of asymmetric price transmission in section 2, we describe the explanations for asymmetric price transmission that have been proposed in section 3. In section 4 we focus on the econometric techniques used to quantify asymmetry. Section 5 concludes with a discussion of outstanding methodological problems and suggestions for future research. Our main conclusion is that the existing literature is far from being unified or conclusive, and that a great deal of work remains to be done. A wide variety of often conflicting theories of and empirical tests for asymmetry co-exist in the literature. Furthermore, existing tests are not discerning in the sense that they as a rule to do not make it possible to choose between competing explanations for asymmetry on the basis of empirical results. Therefore, after more than three decades of work, a considerable need for further research remains, and it would appear premature to draw far reaching conclusions for theory and policy on the basis of work to date.
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Опубликовано на портале: 12-12-2003
Alastair Bailey, Xavier Irz, Kelvin Balcombe
Durban, 2003
The measurement of the impact of technical change has received significant attention within the economics literature. One popular method of quantifying the impact of technical change is the use of growth accounting index numbers. However, in a recent article Nelson and Pack (1999) criticise the use of such index numbers in situations where technical change is likely to be biased in favour of one or other inputs. In particular they criticise the common approach of applying observed cost shares, as proxies for partial output elasticities, to weight the change in quantities which they claim is only valid under Hicks neutrality. Recent advances in the measurement of product and factor biases of technical change developed by Balcombe et al (2000) provide a relatively straight-forward means of correcting product and factor shares in the face of biased technical progress.

This paper demonstrates the correction of both revenue and cost shares used in the construction of a TFP index for UK agriculture over the period 1953 to 2000 using both revenue and cost function share equations appended with stochastic latent variables to capture the bias effect. Technical progress is shown to be biased between both individual input and output groups. Output and input quantity aggregates are then constructed using both observed and corrected share weights and the resulting TFPs are compared. There does appear to be some significant bias in TFP if the effect of biased technical progress is not taken into account when constructing the weights.
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