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1.
A simple model of statistical discrimination is analyzed, which captures some stylized facts of the South African labor market. It shows that this type of discrimination disappears when the wage rates are determined by efficient bargaining between a representative firm and a union, with endogenous membership. This may explain why the wage gap between Black and White workers in post-apartheid South Africa is smaller among unionized workers than among non-unionized ones. 相似文献
2.
让·保尔·阿尔杜伊 《技术经济与管理研究》2005,(3):13-14
佩皮尼昂市以其城市规划,以其过去和未来在社会经济文化方面的巨大发展变化,正无可争辩地列入欧洲都市的网络之中。她的地位也从“大的小城市”变为“小的大城市”。 相似文献
3.
This paper investigates the effects of crop genetic diversity on farm productivity and production risk in the highlands of Ethiopia. Using a moment-based approach, the analysis uses a stochastic production function capturing mean, variance, and skewness effects. Welfare implications of diversity are evaluated using a certainty equivalent, measured as expected income minus a risk premium (reflecting the cost of risk). We find that the effect of diversity on skewness dominates its effect on variance, meaning that diversity reduces the cost of risk. The analysis also shows that the beneficial effects of diversity become of greater value in degraded land. 相似文献
4.
Despite its importance, little is known about the prevalence of theory in the literature on advertising research. Utilising a content analysis of the three premier advertising journals over an 11-year period, it is found that only 17% of articles have made explicit use of theory. Psychology is the discipline from which the greatest number of articles drew their theoretical frameworks, followed by sociology and economics – indeed, theories from marketing and advertising are in the minority. Limitations are noted and implications of the results are discussed. 相似文献
5.
The article presents an integrated analysis of the effects of domestic and trade policy reform on resource allocation and welfare under transaction costs. It develops a general multiagent, multicommodity model, where transaction costs are the costs of resources used in the exchange process. The influence of domestic and trade policy (including both price and quantity instruments) on distorted market equilibrium is analysed. Alternative concepts of distorted equilibrium are presented and investigated. They provide a basis for evaluating the effects of multilateral partial market liberalization on resource allocation and welfare under transaction costs. New conditions are derived under which multilateral policy reforms generate Pareto improvements. 相似文献
6.
7.
Jean-Paul Chavas 《Revue canadienne d'agroeconomie》1982,30(3):345-358
The specification of supply/demand relationships has received considerable attention in agricultural economics (Heien 1977). Economic theory has helped provide a basis for the specification of such relationships, one of its contributions being the proposition that prices should be interpreted only in relative terms. This has had a profound influence on model building in agricultural economics, leading a number of researchers to avoid the use of absolute prices in economic analysis. For this reason, numerous market models of the agricultural economy use price ratios as explanatory variables (e.g., Chen; Chen et al.; Heien, 1976; Gerra; Kulshreshtha and Wilson; Rahn; Talpaz; Morzuck et al.; Houck and Gallagher; Wilson et al.); these examples suggest that the use of such ratios is fairly widespread in econometric modeling of the crop and livestock sectors. One of the best examples of price ratios is the "feed cost to price" ratio commonly used in the analysis of livestock supply response. Indeed, since feed cost constitutes a major part of the total production cost in livestock activities, the "feed cost to price" ratio is often considered a proxy for profitability. For this reason, data on such ratios are regularly published for various livestock activities (e.g., USD A). Also, "feed cost to price" ratios are often employed in the specification of models of livestock supply response, (e.g., Chen; Chen et al.; Heien 1976; Gerra; Kulshreshtha and Wilson; Rahn; Talpaz). However, not all models of aggregate supply response follow this approach. For example, Freebairn and Rausser, and Arzac and Wilkinson, use prices as separate variables rather than in ratio forms in their models. In particular, they do not employ price ratios in their livestock and crop supply equations. The existence of these different approaches raises questions about the appropriateness of the use of price ratios in the modeling of aggregate supply. 相似文献
8.
We analyse the interaction between the dividend policy and the decision on investment in a growth opportunity of a liquidity
constrained firm. This leads us to study a mixed singular control/optimal stopping problem for a diffusion that we solve quasi-explicitly
by establishing a connection with an optimal stopping problem. We characterize situations where it is optimal to postpone
the distribution of dividends in order to invest at a subsequent date in the growth opportunity. We show that uncertainty
and liquidity shocks have an ambiguous effect on the investment decision.
相似文献
9.
The microeconomics of food security 总被引:1,自引:0,他引:1
This article develops a dynamic microeconomic model of food security under uncertainty, with special focus on the relationships between food demand, nutrition and human survival. It investigates the influence of entitlements on malnutrition, hunger and starvation under uncertainty. It develops useful insights on the links between food security and a number of policy instruments commonly used in dealing with malnutrition and starvation. 相似文献
10.
National accounts are a powerful means of coordinating different statistical systems. The better their classifications are adapted to the basic statistics or the information blocks one wishes to use, the better the national accounts play their part. This statement explains why, taking the opportunity of revising the whole system, French national accountants tried to improve the concordance between financial operation tables and monetary statistics. Other reasons leading to this attempt can be found in the dissatisfaction of users having to face different and inconsistent financial information such as the monetary statistics on one hand and the financial aggregates of the national accounts on the other; and even more reasons appear in the organizational field since those two statistical systems are issued by two neighbour services of the Banque de France, often depending on the same sources. Further, many propitious factors are converging at the same time: the French financial system is undergoing profound transformations originating as much in the behaviour of economic agents as in the law, and the statistical operations have to adapt to these changes. The national accounts will in the near future include balance sheets in which financial asset holdings are directly comparable to the money supply aggregates. In its first part our paper sets forth the detailed reasons for our attempts, the conditions in which it took place and the present results. We have reached a much better degree of consistency between the two systems, even if the final scheme has not yet been adopted in either the monetary field or in the field of national accounts. But an important question remains open about the durability of the harmonization: we think that it could be relatively uncertain because of the differences in the goals pursued by the two systems and the constraints which they face. That is why in the second part of the paper we tried to review the way such a pragmatic undertaking as ours could call into question the way in which financial operations are described in the system of national accounts. If one agrees with the present boundary between the real and the financial sphere, the articulation must remain somewhat elementary. But if one wants to revise the usual so-called dichotomy between financial and non financial phenomena, we think that a complete rebuilding of the conceptual framework of the accounts has to be done; this would necessitate a considerable amount of theoretical and practical work. 相似文献