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Sponsors of defined contribution retirement plans typically limit the investment choices of plan participants to a small number of investment managers and a limited number of investment vehicles. Such restrictions may limit excessive risk-taking by participants but also may preclude opportunities for efficient diversification. Many college and university 403 (b) plans have restricted investment choices to the retirement annuities offered by TIAA-CREF, the current manager of over half of all 403(b) contributions. Using 10 years of historical data, we study the efficiency of this TIAA-CREF opportunity set relative to a larger set that includes several standard index funds. Extrapolations must be interpreted -with caution. Assuming optimal rebalancing, depending on loss aversion and diversification constraints, the historical sample of returns implies that over a 20-year remaining work life, an employee -with an expanded menu that includes standard index funds could gain over 40% in terminal wealth compared to one who is restricted to TIAA-CREF retirement annuities. Even when a naive diversification strategy of equally weighting (1/n) all available funds is used, the expandedmenu outperforms the restricted portfolio by more than 25% over20years. These differences generally are significant at conventional levels based on parametric and nonparametric testing and do not appear to result from idiosyncratic market performance durinz the sample period. 相似文献
85.
We examine two potential mechanisms through which disclosure quality is expected to reduce information asymmetry: (1) altering the trading incentives of informed and uninformed investors so that there is relatively less trading by privately informed investors, and (2) reducing the likelihood that investors discover and trade on private information. Our results indicate that the negative relation between disclosure quality and information asymmetry is primarily caused by the latter mechanism. While information asymmetry is negatively associated with the quality of the annual report and investor relations activities, it is positively associated with quarterly report disclosure quality. Additionally, we hypothesize and find that that the negative association between disclosure quality and information asymmetry is stronger in settings characterized by higher levels of firm-investor asymmetry. 相似文献
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Brian P. Brown Alex R. Zablah Danny N. Bellenger Naveen Donthu 《Industrial Marketing Management》2012,41(3):508-520
Building on information processing theory (IPT), this empirical study investigates the factors that drive a buying center's level of sensitivity to brand information. The authors propose that buying center brand sensitivity is related in a curvilinear fashion with purchase importance and purchase complexity, and that these relationships are moderated by several environmental, firm, and product factors. Data provided by 273 organizational buying center members confirm the presence of an inverse U-shaped relationship between purchase importance and brand sensitivity, strengthened in conditions of high brand presence and high end-customer demand. Purchase complexity and brand sensitivity appear to relate in a U-shaped fashion but only in light of the moderating effects of product tangibility. The relationship between purchase complexity and brand sensitivity appears stronger when buying firms are small and have prior contractual ties with their selling partners. These results offer guidance to managers concerning when business-to-business (B2B) brand investments are likely to offer their greatest return. 相似文献
88.
Industrial relations research has traditionally viewed trade unions as the primary mechanism for employee voice. With the decline in unionism in many advanced industrial economies over the past two decades, new direct non-union voice mechanisms have been introduced by employers. This focus on the mechanisms for employee voice, however, fails to take account of employees' perceptions of voice. We suggested that employee perceptions of voice vary between the different levels of an organisation and proposed that trade union membership will be more likely to enhance individual employee perceptions of voice at the wider organisational level. Contrary to our expectations, our analysis of 2,949 employees of a public sector scientific research organisation found that union membership had a significant negative impact on employee voice at the organisational level. The article concluded by offering possible explanations for this unexpected finding and the implications for theory, management and future research. 相似文献
89.
Charles Brown Judith Connor Steven Heeringa John Jackson 《Small Business Economics》1990,2(4):261-277
This paper addresses the usefulness of a longitudinal data file constructed from records on employers from the Michigan Employment Security Commission. We describe the main features of the data file, which includes quarterly (and in some cases, monthly) data from the third quarter of 1978 through the first quarter of 1983, plus the fourth quarters of 1983–87. We then illustrate the uses of the data with two examples: (1) studying changes in the Michigan economy, in particular the early growth and survival of new units of different sizes; and (2) studying the behavior of wages and employment following changes in ownership.Judith Connor and Steven Heeringa are primarily responsible for Section II and the Appendix, John Jackson for Section III, and Charles Brown for Section IV. 相似文献
90.
M.S. Reed A. Bonn W. Slee N. Beharry-Borg J. Birch I. Brown T.P. Burt D. Chapman P.J. Chapman G.D. Clay S.J. Cornell E.D.G. Fraser J.H. Glass J. Holden J.A. Hodgson K. Hubacek B. Irvine N. Jin M.J. Kirkby W.E. Kunin F. Worrall 《Land use policy》2009
Upland areas provide UK society with many important functions, goods and services, but have experienced a number of disturbing trends and face an uncertain future. This paper outlines historic, current and future drivers of environmental, economic, socio-cultural and policy change in UK uplands, and assesses how these have affected or are likely to affect ways in which land is used and the provision of ecosystem services. Information is synthesised into scenarios summarising a range of possible futures anticipated for UK uplands to 2060 and beyond. Finally, innovations in science, technology, governance and policy are evaluated that could enable uplands to continue providing key ecosystem services under a range of scenarios. The paper concludes that many upland areas will need to be prepared for significant reductions in grazing and prescribed burning. Conversely, other areas could experience agricultural intensification, for example significant increases in grazing or an expansion of arable or bioenergy crops into upland valleys, due to anticipated increases in global demand for food and energy. These scenarios will take place in the context of climate change. Many may take place together and may interact with each other, with complex and unpredictable implications for the upland environment, economy and society. In this context, a number of advances are needed in science, technology and policy to maintain viable upland communities and the future provision of ecosystem services. These may include funding for ecological and hydrological restoration via carbon offsetting or other means. It may also involve advances in ecosystem service modelling, mapping and valuation, which through stakeholder participation could facilitate more integrated rural planning. New forms of environmental governance need to be explored that can empower those interested in developing upland economies to maintain thriving upland communities, while managing the ecosystem services they provide as efficiently as possible. 相似文献