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1.
For a sample of NYSE firms, we show that wide spreads are accompaniedby low depths, and that spreads widen and depths fall in responseto bigger volume. Spreads widen and depths fall in anticipationof earnings announcements; these effects are more pronouncedfor announcements with larger subsequent price changes. Spreadsare also wider following earnings announcements, but this effectdissipates quickly after controlling for volume. Collectively,our results suggest liquidity providers are sensitive to changesin information asymmetry risk and use both spreads and depthsto actively manage this risk. 相似文献
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Health is one of the crucial problems confronting the development of Third World countries. Community‐based primary health care is the best instrument for mobilising community development.Development through health, however, can only be achieved if primary health care is implemented in a comprehensive approach in which a supportive environment and living conditions are as important as the provision of health care services. The Venda care group organisation, like other village health workers, is involved in primary health care and community development in the communities of the care groups. Such supportive community‐based organisations are able to alleviate health and development problems at the grass roots provided that programmes and activities are based on community participation, self‐reliance and the development of local decision‐making and leadership skills. The degree of success of the Venda care group organisation in achieving these objectives was investigated. 相似文献
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This study enhances our understanding of the complex relationship between diversity and employee retention. The study found that positive perceptions of an organization's “diversity climate” were related to decreased turnover intentions and found support for the proposition that calculative attachment mediated this relationship. In addition, the study considered potential interactions with diversity climate perceptions in predicting calculative attachment and found support for satisfaction with pay as a moderator, but not supervisor effectiveness. Finally, the study determined that the benefits of a positive diversity climate may extend to all employees, including White men. ©2011 Wiley Periodicals, Inc. 相似文献
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Efficiency with costly information: a reinterpretation of evidence from managed portfolios 总被引:4,自引:0,他引:4
We investigate the informational efficiency of mutual fund performancefor the period 1965-84. Results are shown to be sensitive tothe measurement of performance chosen. We find that returnson S&P stocks, returns on non-S&P stocks, and returnson bonds are significant factors in performance assessment.Once we correct for the impact of non-S&P assets on mutualfund returns, we find that mutual funds do not earn returnsthat justify their information acquisition costs. This is consistentwith results for prior periods. 相似文献
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As employee work patterns change, the need for flexible plan design has increased. Hybrid plans such as cash balance plans offer a plan design variation that incorporates elements of the traditional defined benefit plan as well as those of defined contribution plans. This article examines plan design trends and discusses both negative and positive reactions to those trends. Finally, the solution of offering choice to plan participants is suggested, and the issues that must be considered are discussed. 相似文献
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When a market order arrives, the NYSE specialist can offer aprice one tick better than the limit orders on the book andtrade for his own account. Alternatively, the specialist can'stop' the market order, which means he guarantees executionat the current quote but provides the possibility of price improvement.My model shows that specialists can use stops to sample thefuture order flow before making a commitment to trade. I presentempirical evidence that both stops and immediate price improvementimpose adverse selection costs on limit order traders. 相似文献
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This study tests for long-run relative purchasing power parityamong a sample of 27 African less developed countries. For thispurpose, a new test advocated by Im and co-workers is employedwhich allows one to test for unit roots in heterogeneous paneldatasets. This is known as the t-bar test, by which purchasingpower parity is confirmed or rejected on the basis of whetheror not the average augmented Dickey-Fuller statistic based ondemeaned data is significantly different from zero. Using quarterlydata covering the period 1974-97, purchasing power parity isgenerally rejected using individual country unit root testsbut support is found using the t-bar test. This suggests thatlow power problems in testing for purchasing power parity canbe overcome using this panel data procedure. The findings alsosupport the view that purchasing power parity is most likelyto be found among high inflation less developed countries andthat the half-life of a one-off random shock to parity is approximatelysix quarters. These results are generally confirmed for the1960-73 period. 相似文献