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31.
An attempt is made in this paper to formulate a satisfactory duality theory of efficient and optimal programs in intertemporal models with irreversible inveatment. The introduction of the constraint that depreciated capital stock cannot be used for present consumption makes the meaningful choice and interpretation of dual variables a more difficult problem, as is pointed out by means of an example. A new definition of a competitive program is introduced, and this is seen to lead to useful characterizations of efficient and optimal programs. 相似文献
32.
The connection between changes in commodity prices and the distribution of income is a question of active interest since the 1941 Stolper-Samuelson Theorem. In higher dimensions results are obtained only if structure is imposed. Here we assume that each of n-industries is alike in the shape of the profile (rib) of distributive factor shares with a permutation of factor numbering such that industry n is most intensive in factor n. Such a structure reveals either a strong version of the Stolper Samuelson Theorem or a Neighborhood oscillation pattern depending on the shape of the share ribs. 相似文献
33.
In a two-sector, general-equilibrium model with labor-market search frictions, we find that the wage increases and sectoral unemployment decreases upon offshoring in the presence of perfect intersectoral labor mobility. If, as a result, labor moves to the sector with the lower (or equal) vacancy costs, there is an unambiguous decrease in economywide unemployment. With imperfect intersectoral labor mobility, unemployment in the offshoring sector can rise, with an unambiguous unemployment reduction in the non-offshoring sector. Imperfect labor mobility can result in a mixed equilibrium in which only some firms offshore, with unemployment in the offshoring sector rising. 相似文献
34.
Summary This paper analyzes the feasibility of sustaining uniformly positive consumption forever — even when flows of exhaustible resources are an indispensable input. The main result is a characterization of an economy's capability for sustaining such consumption — under quite general maintained assumptions on technology — in terms of a single, simple capital-resource substitution condition.This is a revised version of CARESS Working Paper #79-27. An even earlier preliminary paper by Mitra [1] contained the seminal idea developed more thoroughly here. Both of our research efforts were supported by the NSF, while much of Cass's participation took place during his tenure as a Sherman Fairchild Distinguished Scholar at Caltech. We thank both institutions for their support and encouragement. 相似文献
35.
36.
The bid-ask spread of stock prices is examined for a sample of dividend initiating firms. The average percentage and dollar bid-ask spreads increase significantly on the day preceding the Wall Street Journal Index announcement date, possibly reflecting, on average, the market maker's anticipatory uncertainty. The day -1 increase in spread is inversely associated with firm size, an information environment proxy, after considering the simultaneous effects of dividend yield, returns variance, dollar trading volume and share price. The average percentage spread declines significantly on day 0 from its day -1 level and remains lower, on average, over a 365 day post-announcement period than 90 day pre-announcement levels. Similar results are obtained for dollar spread averages. The post-announcement percentage spread decline suggests a resolution of uncertainty, and is positively associated with the dividend yield. Dividend initiation announcements appear to reduce informational asymmetry. 相似文献
37.
选取我国10只开放式基金作为样本,根据它们的收益情况并联系市场背景,对它们基金管理人的选时与选股能力进行的实证研究表明,不同基金在市场上升和市场下降过程中所表现出来的选时能力指标和选股能力指标与整体指标并不相同.这一结论可用于基金整体性指标研究. 相似文献
38.
Aparna Mitra 《Atlantic Economic Journal》1999,27(2):179-192
The effects of firm and job characteristics on the wages of blacks and whites are analyzed using data from the 1988 National Longitudinal Survey of Youth [Bureau of Labor Statistics, 1997]. This study focuses on 2,370 full-time private sector employees. The results show that, first, blacks are disproportionately employed in large establishments despite their lower cognitive achievements. Second, blacks do not enjoy significant wage premiums associated with supervisory positions. Third, although the wage gap between blacks and whites is reduced considerably, controlling for education and cognitive skills, the gap increases significantly when structural attributes are included in the wage regressions despite the large wage premiums associated with employment in large establishments. 相似文献
39.
The present paper examines the problem of aggregating infinite utility streams with a social welfare function that respects the Anonymity and Weak Pareto Axioms. The paper provides a complete characterization of domains (of the one period utilities) on which such an aggregation is possible. A social welfare function satisfying the Anonymity and Weak Pareto Axioms exists on precisely those domains that do not contain any set of the order type of the set of positive and negative integers. The criterion is applied to decide on possibility and impossibility results for a variety of domains. It is also used to provide an alternative formulation of the characterization result in terms of the accumulation points of the domain. 相似文献
40.