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Аграрная экономика - – это часть экономической теории. Она изучает использование ограниченных ресурсов в производстве, переработке, реализации и потреблении продовольствия... (подробнее...)
Всего публикаций в данном разделе: 71

Опубликовано на портале: 12-12-2003
Jose A. Gomez-Limon, Laura Riesgo, Manuel Arriaza
Durban, 2003
In this paper we present a methodology to analyse input use in the agricultural sector. The novelty of the theoretical model explained is that it has been developed considering a multi-criteria environment. Thus, the optimal input use condition is determined by the assessment of "multi-attribute utility" and "multi-attribute marginal utility". We show how the approach adopted in this paper is a generalization of the single-attribute expected utility theory. The theoretical model developed is further implemented in an empirical application that studies water for irrigation use as a particular case. Results show how multi-attribute utility functions elicited for a sample of 52 irrigators explain differences on irrigation water use in relative homogenous agricultural systems, albeit exhibiting similar water partial utility functions. We conclude that these differences come from the dissimilar weights that farmers attached to each attribute in the aggregate utility function. The irrigated area considered as case study is located in North-western Spain.
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Опубликовано на портале: 30-11-2003
Atanu Ghoshray, Tim Lloyd
2003
This paper brings time series techniques to bear on the relationships between the prices of the principal types of wheat traded internationally. In all, the relationships between eleven wheat prices (categorised by wheat quality, harvest date and port of despatch) are scrutinised to uncover the structure of the wheat market implicit in the behaviour its prices reveal. The statistical evidence supports the notion of a highly integrated market that is segmented according to wheat strength . the principal determinant of end-use. Three segments are identified: a market for "strong" (bread-making) wheat, another for "weak" (confectionary products- making) wheat and a third for medium strength wheat suitable for unleavened breads and noodles. Whilst informative, market integration - detected by cointegration among prices . is not altogether surprising, yet the presence of cointegration implies a causal structure, which is of more cogent interest. Among a number of complementary techniques, linkages are uncovered using an innovative concept of irreducible cointegration vectors (Davidson 1998, Barassi et al 2001) which provides new evidence on price linkages. Statistical evidence is robust and not test-dependent. Specifically, we find a dominant price leader in each sub-market. In terms of its pricing, the EU is found to play a passive role in the world market, confirming a widely held view.
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Опубликовано на портале: 30-11-2003
J. Meyer
2003
Applied econometric analyses of market integration based on price data alone have been criticised, because they neglect the role of transaction costs. To meet this objection threshold vector error correction models are used. Threshold models can account for the effects of transaction costs in price transmission without directly relying upon information about these costs, which are often unavailable. Results from threshold models that are based on two thresholds provide results that are economically more intuitive than those obtained from one threshold models. However there is no adequate econometric test for threshold significance in a two- threshold model available so far; such tests are only available for the one threshold model. In this paper a restricted two-threshold model is developed in which the significance of the thresholds can be tested. This model is therefore amenable to economic interpretation and statistical inference. This model is used to estimate market integration on the European pig market.
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Опубликовано на портале: 30-11-2003
Jay Fabiosa, John C. Beghin, Stephane de Cara, Cheng Fang, Murat Isik, Holger Matthey
2003
Using a partial equilibrium model of world agriculture, we investigate the multilateral removal of all border taxes and farm programs and their distortion of world agricultural markets. These distortions have significant terms-of-trade effects. World trade is also significantly impacted by both types of distortions. Trade expansion is substantial for most commodities, especially dairy, meats, and vegetable oils. Net agricultural and food exporters (Brazil, Australia, and Argentina) emerge with expanded exports; whereas net importing countries with limited distortions before liberalization are penalized by higher world markets prices and reduced imports. The US gains significant export shares in livestock products and imports more dairy products. Without protection and domestic subsidies, the EU loses many of its livestock and dairy export markets.
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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: 30-11-2003
Jun Furuya, Takeshi Sakurai
2003
Most of the large-scale millers in Ghana provide a loan to the farmers under the agreement that the farmers will bring their paddy to them.

This paper examines the effect of this interlinkage on the efficiency of rice milling. A quadratic cost function was estimated, and capacity utilization was calculated in relation to money lending. The results show that if the millers provide a loan to the farmers, the operating rate will increase by 24%.
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Опубликовано на портале: 30-11-2003
Paul Dorosh, Moataz El-Said, Hans Lofgren
2003
In Uganda, as in much of sub-Saharan Africa, poverty is concentrated in rural areas. Because agriculture accounts for a large share of incomes for these households, policies and external shocks that affect agriculture, including shifts in world prices, changes in agricultural productivity, and reductions in marketing costs, may have significant effects on rural poverty. In this paper, we use a Computable General Equilibrium (CGE) model of the Ugandan economy, explicitly designed to capture regional variations in agricultural production and household incomes, to examine the implications of these policy changes and shocks.

Simulation results suggest that a doubling of area planted to coffee (the government.s target) would increase rural consumption by less than 2.0 percent, because of an estimated 10 percent decline in the world price of robusta coffee and an 11.3 percent real exchange rate appreciation of the Ugandan shilling. Smaller productivity increases in food crops may have greater potential to raise rural incomes, provided that markets perform well and producer incentives are maintained. A five percent increase in agricultural productivity raises consumption by 1.3 to 2.1 percent among rural households and lowers food prices by 3.4 to 3.8 percent relative to the CPI, thus benefiting households with high food consumption shares. Reducing agricultural marketing margins by 30 percent leads to increases of 2.3 to 4.1 percent in consumption of farm households, with the largest gains in regions where consumption out of own production is lower.
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Опубликовано на портале: 30-11-2003
R. Barrena, M. Sanchez, A. Gracia, Jose Maria Gil
2002
Recent food scares in the food market has caused a reduction in consumer’s confidence in the food system that it has induced a significant reduction in consumption in a sector, the beef sector that was already characterized by a saturated trend in quantity terms. In this context, all participants in the beef production system are facing to a greatchallenge, to retrieve consumer’s confidence in the food chain and to mitigate the reduction in beef consumption. The aim of the paper is to analyse the impact of consumer’s confidence in the food system as well as other factors on the explanation of food consumption reduction. A structural modelling approach has been used to analyse factors affecting the reduction in beef consumption in two different regions characterised by different production systems and different marketing strategies (PGI beef label). Results indicate that main factor explaining the reduction in beef consumption is the confidence in the beef and a positive relation has been found. Moreover, confidence in a product is directly related to the perceived quality offered by farmers and other decision makers on the beef chain, and to the consumer involvement with the product. Therefore, the main implication is that participants in the food chain has to develop adequate communication strategies such as quality labelling in order to increase consumers perceive quality because, higher quality perception will recover consumers’ confidence in beef, and therefore, it will mitigate beef consumption reduction.
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Опубликовано на портале: 30-11-2003
Mario Mazzocchi, Gianluca Stefani
2002
The paper develops a measure of consumer welfare losses associated with withheld information about BSE linkage with vCJD. food safety. The Cost of Ignorance (COI) is measured by comparing the utility of the informed choice with the utility of the uninformed one, under condition of improved information. Unlike previous work, based on a single equation demand model, the measure is obtained retrieving a cost function from a dynamic Almost Ideal Demand System. The results indicate that Italian consumers bore a significant loss because of the delayed release of information.
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Опубликовано на портале: 29-11-2003
Claire Chambolle, Eric Giraud-Heraud
2002
We analyse the competition in quality and quantity between a foreign firm and a domestic firm. The domestic firm can belong to a certification of origin, whereas its rival uses a pure brand strategy. We will show how the certification can allow the domestic firm to position itself as a high quality producer and improve the average quality of the products offered on the market. If, however, the certified firm offers the low quality good, the certification can permit it to guarantee a higher profit than that of its competitor and to improve the consumers’ surplus by favoring product standardisation.
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Опубликовано на портале: 29-11-2003
Steen Koekebakker, Gudbrand Lien
2002
Empirical evidence suggests that agricultural futures price movements have fat-tailed distributions and exhibit sudden and unexpected price jumps. There is also evidence that the volatility of futures prices contains a term structure depending on both calendar-time and time to maturity. This paper extends Bates (1991) jump-diffusion option pricing model by including both seasonal and maturity effects in volatility. An in-sample fit to market option prices on wheat futures shows that our model outperforms previous models considered in the literature. A numerical example illustrates the economic significance of our results for option valuation.
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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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Опубликовано на портале: 29-11-2003
Agata Pieniadz, Heinrich Hockmann
2002
This study deals with horizontal product differentiation in the Polish pig meat market. Hypothesis among firms behaviour are derived from an illustrative model and tested in an empirical analysis using data from 1991-1998. The empirical analysis suggest that product differentiation is a relevant phenomenon in the polish pig meat markets. In addition we found that costs and competitions are important factors influencing price variation. However, further influences like price discrimination and vertical product differentiation are also important determinants for product price variations.
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Опубликовано на портале: 29-11-2003
Istvan Feher, Zsolt Papp
2002
Based on the Policy Analysis Matrix (PAM) approach this paper provides an assessment of the competitive position of the Hungarian agro-food industry in view of EU integration. The situation in the food processing sector is assessed with the use of actual cost data from representative Hungarian companies. The paper presents an assessment of the current situation prior to EU integration as well as a future outlook under various scenarios with regard to the expected policy environment and the rate of technological change. The actual measurement of competitiveness in this study focuses mainly on Private Resource Cost (PRC) which indicates competitiveness under real market conditions and Domestic Resource Cost (DRC) which gives an assessment on the social or economic efficiency of an activity, i.e. whether domestic resources are really used efficiently in current production. In the food processing sector 21 different food products have been investigated which fall into four industries: meat, poultry, dairy, and fruits and vegetables. Under current conditions only some products are competitive in private terms. The situation would improve after EU integration especially for poultry, fruits and vegetables, because agricultural policy conditions are more favourable under the CAP. If additional FDI(Foreign Direct Investments) would flow into the country after EU membership, this would boost profitability. As far as DRC values are concerned, it must be stated that only some of the production activities are clearly efficient. Dairy, fruits and vegetables, and roast goose production show relatively weak social competitiveness, while other poultry and fruit and vegetables products are more favourable from the economic point of view. As EU policies provide on average higher protection levels, the competitiveness of Hungarian food processing on world markets would deteriorate for most products after EU accession. However, these effects can be offset by additional technological change due to FDI inflows or otherwise induced technological progress.
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Опубликовано на портале: 29-11-2003
Christos Fotopoulos, Athanasios Krystallis, Mitchell Ness
2002
The present study attempts to offer more insights into the Greek wine market with emphasis on wines produced from organically grown grapes by relating wine choice to consumers’ personal value structure. With the use of a qualitative sample and applying the Means-end Chains methodology and the corresponding “laddering” interviewing technique, it attempts first to reveal the way basic motives are linked to wine shopping behaviour of consumers and the way wine purchase-relevant knowledge is stored and organised in their memory in relation to their personal values. Then, by discriminating between organic food buyers and non-buyers, the study identifies motivational and cognitive discriminating differences between the two consumer types, which can offer a solid explanation as to their distinctive purchasing behaviour in respect of the organic products.
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Опубликовано на портале: 29-11-2003
John Helming, Jack Peerlings
2002
A modelling system is presented and used to analyse the impact of milk quota abolishment on Dutch agriculture and economy. The modelling system consists of a regionalised, agri-environmental, partial equilibrium, mathematical programming model of agriculture supply in the Netherlands integrated into a mixed input-output model. It was found that abolition of the milk quota system has large impacts on milk production and livestock numbers and composition. The latter is explained by the strict mineral and manure policies in the Netherlands; an increase in the numbers of dairy cows leaves less room for other livestock. It is also found that, although the total effect on gross value added in the Dutch economy is limited, the effects for individual industries can be large.
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Опубликовано на портале: 29-11-2003
Markus Lips, Peter Rieder
2002
This paper discusses an approach to implement output quotas in the GTAP model which permits an endogenous adjustment of both the supplied quantity and the quota rent. Since the quota rent is interpreted as additional earnings of the factors used no change of the worldwide GTAP data base is required. Several modifications of the GTAP model and two exogenous coefficients are necessary. Considering uncertain values of one of the coefficients, systematic sensitivity analysis is applied. The abolishment of the raw milk quota in the European Union would lead to a remarkable decrease in raw milk prices in most member countries. The raw milk production increases in Denmark, Ireland, Luxembourg and the Netherlands while it declines in Greece and Portugal. In the other member countries the raw milk production changes slightly.
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Опубликовано на портале: 29-11-2003
Bruno Henry De Frahan, Christian Tritten
2002
This paper proposes a partial equilibrium displacement model that differentiates wheat according to its end-use and country of origin to investigate the impact of alternative European trade policies on wheat supply and demand in France. Transmission, demand and supply elasticities are estimated for each class and origin of wheat. Simulation results show that rebalancing trade protection across wheat classes encourages domestic supply of high quality wheat and displaces imports from North America.
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Опубликовано на портале: 29-11-2003
Markus Bjerre, Jorgen Dejgaard Jensen
2002
The paper deals with problems concerning the current sugar policy within the Common Agricultural Policy, especially the efficiency losses due to the combination of high prices and quota on subsidised sugar production. Based on a simple econometric model, the total economic costs of the current policy setting, compared with an unregulated setting, are estimated to be in the area of 20 per cent of the total sugar production, valued at world market prices. Of these costs, some 10 per cent are due to inefficiency in the crop production, as the opportunity costs of land are not taken into account because the sugar price support within the quota overrules these opportunity costs. However, according to the estimates obtained in the present study, the main economic gains by reducing the internal prices are to be found in terms of reduced consumer costs rather than improved efficiency in land use.
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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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