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Всего публикаций в данном разделе: 565

Авторы:
А Б В Г Д Е ЖЗ И ЙК Л М Н О П Р С Т У Ф Х ЦЧ Ш 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 Г Д ЕЖЗ И ЙК ЛМ НО П Р С Т У ФХЦ Ч ШЩЭ ЮЯ
1 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: 21-03-2004
Данная публикация представляет нобелевскую лекцию американского экономиста Гэри Стэнли Беккера по случаю получения им в 1992 году премии памяти Альфреда Нобеля по экономике за расширение области применения микроэкономического анализа к широкому кругу проблем человеческого поведения и взаимодействия, включая поведение вне рыночной сферы. В лекции автор пытается описать жизнедеятельность индивида, используя экономические модели. Сообщение написано простым английским языком и находится в открытом доступе на официальном сайте "Премии".
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Опубликовано на портале: 31-12-2003
John C. Beghin, Jean-Christophe Bureau, Sophie Drogue
Durban, 2003
We introduce an easily implemented and flexible calibration technique for partial demand systems, combining recent developments in incomplete demand systems and a set of restrictions conditioned on the available elasticity-estimates. The technique accommodates various degrees of knowledge on cross-price elasticities, satisfies curvature restrictions, and allows the recovery of an exact welfare measure for policy analysis. The technique is illustrated with a partial demand system for food consumption in Korea for different states of knowledge on cross-price effects. The consumer welfare impact of food and agricultural trade liberalization is measured.
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Опубликовано на портале: 29-11-2003
John C. Beghin, Jean-Christophe Bureau, Sung Joon Park
2002
As part of its food security policy, South Korea has been pursuing food self-sufficiency using high tariffs and high administrative prices in key agricultural and food markets. Using a dual approach to trade and trade restrictiveness indices, we analyze the impact of these market distortions on welfare and trade volume. Then, we compute optimum distortions, which minimize the welfare cost of observed self-sufficiency and production objectives. We rationalize these optimum distortions to what could be claimed as legitimate protection under a “food security” (FS) box in World Trade Organization negotiations. FS-box protection is sensitive to changes in the definition and the extent of the FS objectives. We show that FS via production targets and reliance on imports would be more palatable to consumers and trade partners, while preserving rents to the farm sector.
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Опубликовано на портале: 25-12-2002
Maria Bengtsson, Anders Soderholm
2002
The paper starts with a discussion on time, and on how different time reckoning systems have been introduced and used to coordinate activities. The discussion leads to the conclusion that time has become institutionalized and conceived of as a taken-for-granted commodity. At the same time, however, time is socially constructed. We argue that different constructions of time can be escribed using four dimensions (rate, duration, synchronization, and sequence), and that that the construction of time, as far as the four dimensions are concerned, is of importance for the organizing and coordination of activities. Four different coordinating principles (time schedules, levelers, checkpoints, and brackets) are derived from a discussion on the four dimensions. Thereafter five empirical examples on coordination of time are presented. The empirical examples are used to further analyze the coordinating principles and suggest a comprehensive understanding of the when-question.
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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: 24-12-2003
Catherine Benjamin, Chantal Gueguen, Magalie Houee
Durban, 2003
Previous quantitative assessments of likely impacts of recent reforms of the Common Agricultural Policy (in particular the Agenda 2000) differ across empirical studies. Differences are mainly due to the ways the policy instruments are taken into account (explicit modeling or implicit modeling i.e. using ad-valorem equivalents). The aim of this paper is to assess empirically the impacts of recent reforms of the Common Agricultural Policy and the consequences of the Mid-Term proposals on world cereals markets. We develop an econometric, dynamic, multi-product, partial equilibrium commodity model that focuses on arable crops. Major exporters and major importers are modeled separately, other countries being included in a rest of the world category. For the countries or regions explicitly integrated the model estimates supply, demand and trade. The model we develop has two important features:
i) the parameters estimated in the behavioral equations (supply and demand) satisfy regularity conditions and
ii) the agricultural policy instruments (in particular CAP instruments) are modeled in an explicit way.

In the empirical section, attention focuses on the world cereals market. We provide a market outlook through the year 2009 for three different scenarios: baseline projections and two scenarios based on different assumptions regarding the evolution of the Common Agricultural Policy (the Mid-Term Review scenario and the decoupling scenario). Estimated effects of the mid-term scenario on EU crop prices depend on the relationship between EU and world market prices.
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Опубликовано на портале: 29-11-2003
Catherine Benjamin, Isabelle Piot
2002
The European Union beef market regulation is largely influenced by the Common Agricultural Policy (CAP). With the 1992 CAP reform, there was a partial shift by the EU from product price support to a more direct form of income support by way of direct payments. For beef there was a move to direct payments on intermediate products which was essentially a direct payment for the possession of various categories of animals and these were linked to a land resource base. The Agenda 2000 reform consists in a further price decrease associated with an increase in direct payments. The objective of this paper is to assess how the behaviour of beef producers is sensitive to changes in production prices and to changes in premiums. The analysis relies on an analytical framework which allows to take into account the dynamic feature of beef production and the subsidies provided by the Common Agricultural Policy. We studys how the beef supply response is modified when various exogenous variables like prices or premiums are changed. The application focuses on the dynamics of beef supply response in the French beef sector.
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Опубликовано на портале: 29-11-2003
Monia Ben-Kaabia, Jose Maria Gil, L. Boshnjaku
2002
The analysis of asymmetries in the price transmission mechanism at different levels of the marketing chain provides some interesting information about the degree of competition in vertical related markets. The objective of this paper is to investigate the non-linear adjustments of prices along the lamb sector in Spain. The methodology used is based on the multivariate approach to specify and estimate a Threshold Autoregressive Model. Price relationships at farm, wholesale and retail levels are considered. Results indicate that in the long-run price transmission is perfect and any supply or demand shocks are fully transmitted to all prices in the system. In the shortrun, analyses suggest that the high degree of horizontal concentration among retailers allow them to have market power. Responses to any shock generate an increase of the retail price spread which is more evident when prices show an upward trend.
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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: 28-11-2003
Miriam E. Berges, Karina S. Casellas
2002
The purpose of this paper is to provide some microeconomics tools to discuss and evaluate public policies that imply transfers of income from the public sector to the poor and their impact on their food demand and calories and nutrient intakes. This study is concerned with the differences in subsistence expenditures, own-price elasticities and income elasticities for two households groups segmented by income: those people below the poverty guideline and those above it. The attention of our research is focused on a demand system for all food groups included in a National Consumption Survey and examines the household food consumption behavior by partitioning the sample. A complete system of demand equations, the Linear Expenditure System (LES), has been used due to its relative empirical expediency. Some additional econometric techniques to correct the bias in the parameter estimates were also applied because of the large number of zero observations in the data. Preliminary estimations following the procedure suggested in the Park et al. (1996) paper, gave some results that they were not as good as we expected and we finally use an alternative one based on Shonkwiler and Yen (1999).
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Опубликовано на портале: 13-01-2004
Daniel Berkowitz, David N. DeJong
Berlin, 2000
In previous work BERKOWITZ and DEJONG, used regional commodity-price data covering the period 1993-96 to document the existence of an internal economic border that divides Russia into two distinct economic regions: the ‘Red Belt’ and the ‘rest of Russia’. The Red Belt represents a group of regions that have broadly resisted the implementation of federally initiated market reforms. Here, we extend this work by quantifying two economic implications of this internal border. First, we show that the Red-Belt border has limited the transmission of price signals to regions within the Red Belt. Second, we show that regions within the Red Belt have experienced extremely poor growth performances relative to Russia as a whole.
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Опубликовано на портале: 29-11-2003
Carlo Bernini Carri, Maria Sassi
2002
The paper explores the phenomenon of agricultural convergence on regional base within the EU economic cohesion that has always been and still remains one of the mainstay of the EU building process (EU, 1997). A crucial issue is the theoretical and empirical testing of a catching up process, that is a faster growth of the poor countries (regions) than that of the rich ones. The literature on this topic has strengthened recently, but it is mainly referred to economic convergence undermining the importance of the process in the agricultural sector. The relevance mainly refers to the role of the Common Agricultural Policy (CAP). It is the only European policy thought and managed at overnational level with the specific object to overcome the deep agricultural structural disparities within the Member States. This process has been considered fundamental to reach the agricultural and thus economic European integration. Moreover, the interrelationship (if any) between agricultural and economic convergence is of potential interest given that the nature of structural change within agriculture is likely to shaped by broader economic conditions (especially the state of local labour markets).

Thus, the paper first explores the process of agricultural and economic convergence using EU data on real Gross Domestic Product per capita and real Gross Agricultural Value Added per agricultural Work Unit at the level of NUTS 2 regions for 1982,1986 and 1994. Then, it analyses whether: - The intensity of the convergence process in the agricultural sector has been strong enough to promote a decrease in the gap between the agricultural and the economic performance; - The agricultural and economic process of convergence are related on territorial base. Policy implications are not analysed because data at regional level are not available. In literature, the results of testing convergence hypothesis are mixed and strongly dependent on the methodologies applied, the level of analysis, and the explanatory variables adopted (Bernini Carri, Sassi, 1998).
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Опубликовано на портале: 29-11-2003
Dirk J. Bezemer
2002
The replacement of wage-labour farms by family farms in Central and Eastern Europe during the transformation has been more limited than was initially expected. In this paper a formal framework is developed in order to analyse the behaviour of family farms and socialist-style farms in the presence of risk, given the typical post-socialist environment. Management incentives, ownership structure, lump-sum transfers and consumption choices are shown to have the potential to limit the size of family farms relative to socialist-style farms. The hypotheses are tested with survey data collected by the author in the Czech Republic.
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Опубликовано на портале: 30-11-2003
Maria Bielza, Alberto Garrido, Jose M. Sumpsi
2002
Various forms of revenue insurance have been applied in Canada and in the US with relative success. In this paper different combinations of traditional agricultural policies and revenue and yield insurance are analysed for the Spanish olive oil sector. Taking a database containing about half million Spanish olive growers during 8 campaigns, five possible policies are studied and the results are examined according to different criteria including average revenue and its variability, growers utility gains, taxpayers cost and the transfer efficiency of support. The policies analysed are:
(1) non-intervention;
(2) the policy currently in force in Spain that combines a production aid with a yield insurance;
(3) a revenue insurance, only;
(4) revenue insurance combined with a production aid; and
(5) an aid per tree in combination with revenue insurance.

The methodology is based on Monte-Carlo simulations performed on about 100 groups of growers that have been grouped according to their expected yields and variability. Assuming and estimating olive oil price and yields correlations for each group of growers, the analysis allows for consistent policy comparisons at a very disaggregate level. Using the results for all analysed groups, policies are ranked based on the above criteria at the provincial and national levels. Results show that the current regime of EU production aids of olive oil eliminates the advantage of extending the current yield insurance to a revenue insurance. It is also shown that the level of support delivered by production aids cannot be reached with revenue insurance even with completely subsidised premiums. Finally, it is shown that the policy that combines tree aids with revenue insurance exhibits good results for all examining criteria.
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Опубликовано на портале: 11-12-2002
Lucio Biggiero, Domenico Laise
2002
Organizational decisions are characterized by a multiplicity of choice criteria. This property, which in reality affects virtually all human behaviors, prevents use of the standard (neoclassical) theory of decisions based on the maximization of a single criterion. Rather, the outranking methods developed by the French school of operational research make it possible to deal with multicriterial choices and avoid the defects of the naive method. This paper develops a paradigmatic example in order to show the essential effects of the outranking methods and their compatibility with the theory of limited rationality and satisfactory choices.
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