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81.
This article provides a solution to the curse of dimensionalityassociated to multivariate generalized autoregressive conditionallyheteroskedastic (GARCH) estimation. We work with univariateportfolio GARCH models and show how the multivariate dimensionof the portfolio allocation problem may be recovered from theunivariate approach. The main tool we use is "variance sensitivityanalysis," the change in the portfolio variance induced by aninfinitesimal change in the portfolio allocation. We suggesta computationally feasible method to find minimum variance portfoliosand estimate full variance-covariance matrices. An applicationto real data portfolios implements our methodology and comparesits performance against that of selected popular alternatives. 相似文献
82.
This study investigates the market value of corporate cash holdings in connection with firm-specific and time-varying information asymmetry. Analyzing a large international sample, we test two opposing hypotheses. According to the pecking order theory, adverse selection problems make external financing costly and imply a higher market value of a marginal dollar of cash in states with higher information asymmetry. In contrast, the free cash flow theory predicts that excessive cash holdings bundled with higher information asymmetry generate moral hazard problems and lead to a lower market value of a marginal dollar of cash. We use the dispersion of analysts’ earnings per share forecasts as our main measure of firm-specific and time-varying information asymmetry. Extending the valuation regressions of Fama and French [Fama, E.F., French, K.R., 1998. Taxes, financing decisions, and firm value. Journal of Finance 53, 819–843], our results support the free cash flow theory and indicate that the value of corporate cash holdings is lower in states with a higher degree of information asymmetry. 相似文献
83.
We provide a respecification of an integer programming characterization of Arrovian social welfare functions introduced by Sethuraman et al. (Math Oper Res 28:309–326, 2003). By exploiting this respecification, we give a new and simpler proof of Theorem 2 in Kalai and Muller (J Econ Theory 16:457–469, 1977). 相似文献
84.
Simone de Colle R. Edward Freeman Bidhan Parmar Leonardo de Colle 《Journal of Business Ethics》2017,144(2):251-262
The paper considers two main cases of how the creative arts can inform a greater appreciation of human dignity. The first case explores a form of theater, Commedia dell’Arte that has deep roots in Italian culture. The second recounts a set of theater exercises done with very minimal direction or self-direction in executive education and MBA courses at the Darden School, University of Virginia, in the United States. In both cases we highlight how the creative arts can be important for promoting human dignity in organizations, and how they can lead to a more authentic conversation about values, ethics, and meaning. 相似文献
85.
This paper seeks to estimate the effect of teachers net marginal wages on their working hours, on the basis of a survey of Dutch teachers. The resulting uncompensated wage elasticity is significantly positive and has an average value of 0.2 for males and 0.4 for females. However, a general wage increase is a rather costly solution to teacher shortages. Alternatively, working full-time can be made attractive for part-time teachers by providing a premium for full-time teachers. This kind of premium provides part-time teachers with a stronger incentive to work full-time, as the negative income effect does not occur. Simulation results show that such a premium produces an effect that is almost seven times as large as a general wage increase. 相似文献
86.
87.
88.
Financial analysts tend to demonstrate herding behavior, which sometimes compromises accuracy. A number of explanations spanning rational economic logic, cognitive biases, and social forces have been suggested. Relying on an experimental setting where participants forecast future earnings from a rich information set, we posit and obtain support for individual risk tolerance (or lack thereof) as an explanatory variable for herding behaviors. Specifically, less risk‐tolerant individuals forecast with less boldness and instead issue forecasts in agreement with the consensus forecast. The results are argued to be at least partially a product of cognitive biases and an intuitive reaction to uncertainty. 相似文献
89.
This paper provides an overview of the implications of integrating marketing and purchasing offered by traceability. The research offers some evidence of the adoption of different traceability approaches by actors along the supply chain, illustrating the relevance of the traceability issue and how traceability can be exploited. The paper presents findings from a case analysis process of five actors in the fashion industry. This industry has experienced strong integration between industrial and retail functions and relevant changes in the organisation of production networks (global shift of production to new industrialized countries and emerging markets) which place emphasis on the traceability topic. Traceability emerges as a complex concept that concerns the sharing of information about the product and production processes along the supply chain in BTB networks up to the consumers in the final market. The issue analysed focuses on organising, with a discussion of two different uses of traceability: traceability as a tool for inter-organisational control and traceability as a tool for market power. The two approaches give rise to different implications at the individual company and business network levels. The traceability process has intraorganisational consequences in terms of contents, technologies and actors involved in its implementation. These consequences are different according to the role played by the process. 相似文献
90.
Simone Valente 《Journal of Economics》2005,86(3):229-258
This paper studies the effects of distortionary taxes and public investment in an endogenous growth OLG model with knowledge
transmission. Fiscal policy affects growth in two respects: first, work time reacts to variations of prospective tax rates
and modifies knowledge formation; second, public spending enhances labour efficiency but also stimulates physical capital
through increased savings. It is shown that Ramsey-optimal policies reduce savings due to high tax rates on young generations,
and are not necessarily growth-improving with respect to a pure private system. Non-Ramsey policies that shift the burden
on adults are always growth-improving due to crowding-in effects: the welfare of all generations is unambiguously higher with
respect to a private system, and there generally exists a continuum of non-optimal tax rates under which long-run growth and
welfare are higher than with the Ramsey-optimal policy. 相似文献