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41.
Summary. This research studies the role of multivariate distribution structures on random asset returns in determining the optimal
allocation vector for an expected utility maximizer. All our conclusions pertain for the set of risk averters. By carefully
disturbing symmetry in the distribution of the, possibly covarying, returns, we ascertain the ordinal structure of the optimized
allocation vector. Rank order of allocations is also established when a permutation symmetric random vector is mapped into
the returns vector through location and scale shifts. It is shown that increased dispersion in the vectors of location and
scale parameters benefit, ex-ante, investors as does a decrease in the rank correlation coefficient between the location and
scale parameter vectors. Revealed preference comparative static results are identified for the location and scale vectors
of asset returns. For most issues addressed, we arrive at much stronger inferences when a safe asset is available.
Received: August 8, 2000; revised version: January 8, 2001 相似文献
42.
An algebraic theory of portfolio allocation 总被引：1，自引：0，他引：1
Summary. Using group and majorization theory, we explore what can be established about allocation of funds among assets when asymmetries
in the returns vector are carefully controlled. The key insight is that preferences over allocations can be partially ordered
via majorized convex hulls that have been generated by a permutation group. Group transitivity suffices to ensure complete
portfolio diversification. Point-wise stabilizer subgroups admit sectoral separability in fund allocations. We also bound
the admissible allocation vector by a set of linear constraints the coefficients of which are determined by group operations
on location and scale asymmetries in the rate of returns vector. For a distribution that is symmetric under a reflection group,
the linear constraints may be further strengthened whenever there exists an hyperplane that separates convex sets.
Received: May 15, 2001; revised version: March 20, 2002
RID="*"
ID="*" Journal paper No. J-19797 of the Iowa Agriculture and Home Economics Experiment Station, Ames, Iowa. Project No. 3463,
and supported by Hatch Act and State of Iowa funds.
Correspondence to: D. A. Hennessy 相似文献
43.
Joseph K. W. Fung 《期货市场杂志》2007,27(6):555-574
This study examines the information conveyed by options and examines their implied volatility at the time of the 1997 Hong Kong stock market crash. The author determines the efficiency of implied volatility as a predictor of future volatility by comparing it to other leading indicator candidates. These include volume and open interest of index options and futures, as well as the arbitrage basis of index futures. Using monthly, nonoverlapping data, the study reveals that implied volatility is superior to those variables in forecasting future realized volatility. The study also demonstrates that a simple signal extraction model could have produced useful warning signals prior to periods of extreme volatility. These results indicate that the options market is highly efficient informationally. © 2007 Wiley Periodicals, Inc. Jrl Fut Mark 27:555–574, 2007 相似文献
44.
W. Kip Viscusi 《Risk Management & Insurance Review》2004,7(1):9-24
Proposed tort reforms have focused on punitive damages and noneconomic damages, each of which pose problems for jury decision making. The U.S. Supreme Court decision in State Farm v. Campbell will greatly limit very large punitive damages awards, and will affect smaller punitive awards to a lesser degree. Noneconomic damages caps enacted by state legislatures have greatly enhanced insurance market performance. Insurers operate within the context of a highly imperfect, regulated market in which there is substantial price rigidity induced by regulation. Reform efforts should strive to establish greater predictability and stability in these awards components rather than simply being concerned with imposing specific numerical caps. 相似文献
45.
Do international labor flows influence the prospects for democratization both in the countries that export their excess workers and in the countries that import them? This paper argues that emigration should have a positive effect on political liberalization in net source countries because it decreases the amount of redistribution that would occur in a more democratic regime. Conversely, immigration should have a negative effect on political liberalization in net destination countries through the same causal channel: by increasing the amount of redistribution that would occur in a more democratic regime. South Korea and Singapore are considered as illustrative examples, and the paper provides statistical evidence to support the hypothesis that emigration (immigration) has been positively (negatively) related to future political liberalization. 相似文献
46.
Andras Pete David L. Kleinman Krishna R. Pattipati 《International Journal of Intelligent Systems in Accounting, Finance & Management》1993,2(4):289-303
This paper presents a mathematical model to study the joint impact of organizational design and of the task environment on the decision performance of hierarchical organizations with limited internal communication. The problem context is a special class of distributed situation assessment problems, where possible patterns of binary variables are to be classified on the basis of partial and noise-corrupted information. Structural properties of tasks and organizations are described using a graph formalism, and optimal decision strategies at all decision makers are determined. Organizational expertise is characterized in the form of a Team Relative Operating Characteristic (TROC) curve, thereby replacing the organization by an equivalent single decision maker. Implementing the model, issues of task decomposition and the process of matching organizations with tasks are discussed. 相似文献
47.
David P. Baron 《Journal of Economics & Management Strategy》2003,12(1):31-66
This paper introduces the subject of private politics, presents a research agenda, and provides an example involving activists and a firm. Private politics addresses situations of conflict and their resolution without reliance on the law or government. It encompasses the political competition over entitlements in the status quo, the direct competition for support from the public, bargaining over the resolution of the conflict, and the maintenance of the agreed-to private ordering. The term private means that the parties do not rely on public order, i.e., lawmaking or the courts. The term politics refers to individual and collective action in situations in which people attempt to further their interests by imposing their will on others. Four models of private politics are discussed: (1) informational competition between an activist and a firm for support from the public, (2) decisions by citizen consumers regarding a boycott, (3) bargaining to resolve the boycott, and (4) the choice of an equilibrium private ordering to govern the ongoing conflicting interests of the activist and the firm. 相似文献
48.
Rural roads promote economic development, but they also facilitatedeforestation. To explore this tradeoff, this article developsa spatially explicit model of land use and estimates probabilitiesof alternative land uses as a function of land characteristicsand distance to market using a multinomial logit specificationof this model. Controls are incorporated for the endogeneityof road placement. The model is applied to data for southern Belize, an area experiencingrapid expansion of both subsistence and commercial agriculture,using geographic information system (GIS) techniques to selectsample points at 1-kilometer intervals. Market access, landquality, and tenure status affect the probability of agriculturalland use synergistically, having differential effects on thelikelihood of commercial versus semisubsistence farming. Theresults suggest that road building in areas with agriculturallypoor soils and low population densities may be a \"lose-lose\"proposition, causing habitat fragmentation and providing loweconomic returns. 相似文献
49.
We use the error component two-stage least squares estimation method to examine the effects of the Sino-U.S. exchange rate and the weighted exchange rate between the United States and other Asian countries on the Sino-U.S. trade patterns. Our study suggests that both the exchange rates have contributed to China's increased trade surplus with the United States. China has imported intermediate goods from the Asian countries, produced final goods using its cheap labor, and exported those goods to the United States. This is especially true for bilateral trade of high-tech manufacturing goods. Our study also reveals that the U.S. bilateral trade balance could improve if China appreciates its currency (Yuan) against the U.S. dollar. ( JEL F14, F10, F19) 相似文献
50.
This paper examines some policy issues related to the interaction between internal and external corporate control mechanisms—board dismissals and takeovers—by focusing on the information aggregation and other effects related to this interaction. We model the functioning of corporate control mechanisms as an example of a multilayered principal-agent relationship in which shareholders delegate the task of monitoring management quality to the board and rely on the external takeover market to provide additional disciplining of the manager as well as of the board. This gives rise to two effects: (1) a substitution effect, whereby the takeover market partially substitutes for board dismissal of the manager, leading to greater lenience toward the manager by a board acting in the shareholders' best interest, and (2) a kick-in-the-pants effect, whereby the board is stricter with the manager because it may be dismissed by a successful acquirer who views it as lax. The interaction of these two effects leads to various implications about the behavior of boards and potential acquirers. In particular, a well-functioning internal control mechanism (the board) does not obviate the need for external control (takeovers). Moreover, somewhat counterintuitively, there may be a greater incidence of takeovers when the internal control mechanism is working well than when it is not. 相似文献