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71.
    
Most mortality models proposed in recent literature rely on the standard ARIMA framework (in particular: a random walk with drift) to project mortality rates. As a result the projections are highly sensitive to the calibration period. We therefore analyse the impact of allowing for multiple structural changes on a large collection of mortality models. We find that this may lead to more robust projections for the period effect but that there is only a limited effect on the ranking of the models based on backtesting criteria, since there is often not yet sufficient statistical evidence for structural changes. However, there are cases for which we do find improvements in estimates and we therefore conclude that one should not exclude on beforehand that structural changes may have occurred.  相似文献   
72.
    
Investors have always been interested in reducing inflation risk in their portfolios. However, investors face different types of inflation than those measured by the Consumer Price Index (CPI). Moreover, different asset classes can be used to hedge portfolio inflation. In this paper, we show how individual equities can be used to construct equity portfolios sensitive to customized inflation targets. We illustrate portfolios for three types of inflation: US headline CPI, Forbes Cost of Living Extremely Well Index, and the US Medical Care Price Index. We also show how alternative weighting schemes, such as minimum volatility and maximum inflation beta, can be used to construct inflation‐hedged portfolios.  相似文献   
73.
Got milk? The rapid rise of China’s dairy sector and its future prospects   总被引:1,自引:0,他引:1  
This paper synthesizes recent research and new empirical findings to build a more comprehensive understanding of developments in China’s dairy sector. China’s tremendous rise in dairy demand has been driven by several mutually reinforcing factors: including rapid income growth, promotion by the government and dairy industry, changes in urban lifestyles, and the development of new, more sophisticated marketing channels. Domestic milk output has grown to satisfy rising demand largely by increasing the dairy herd. Substantial increases in productivity have been achieved through technology adoption, but there is evidence that the torrid growth has created inefficiencies because adaptations to marketing rules, infrastructure, and institutions have not kept pace with the changing environment. These results suggest there is ample room for future growth in both domestic milk production and dairy demand, but multinational firms and imported products will likely play and increasing role as China’s dairy market continues to develop.  相似文献   
74.
75.
    
We examine the impact of information technology (IT) on productivity in the public sector econometrically, using data from the BLS Federal Productivity Measurement Program and from Computer Intelligence Infocorp, and by interviewing some government officials. We estimate a production function for government services that includes IT capital as an input, and find a strong positive relationship across federal agencies between productivity growth and computer-intensity growth during the period 1987–92, controlling for growth in compensation and other outlays per employee, and in the number of employees. Our estimates are consistent with the hypothesis that there are 'excess returns' to IT capital.  相似文献   
76.
Interpersonal trust refers to the willingness to make oneself vulnerable to the actions of another party. Trust is generally acknowledged as fostering knowledge exchange and thus contributing to new product development (NPD) team effectiveness. However, the conditions under which NPD teams come to rely more heavily on trust to facilitate effectiveness remain unclear. With burgeoning global collaboration on new product development, we analyze how the characteristics of global NPD teams, i.e., geographic dispersion, computer‐mediated communication (e.g., e‐mail, video‐conferencing), team membership flexibility, and national diversity moderate the trust–effectiveness relationship. Our results show that trust is more important under the condition of geographic dispersion, computer‐mediated communication, and national diversity. By specifying when trust influences NPD team effectiveness in globally dispersed teams, we discuss the theoretical implications and provide recommendations for management.  相似文献   
77.
The second–generation (GSM) spectrum auction in Germany is probably the most clear cut example of a low price outcome in a simultaneous ascending-bid multi-unit auction. The present paper gives an account of the events, describes the auction rules and market conditions, and provides a game theoretic explanation of low price equilibrium in simultaneous, ascending-bid multi-unit auctions. In particular, it is shown that in the unique equilibrium that survives iterated elimination of dominated strategies, the efficient allocation is reached at minimum bids.  相似文献   
78.
Classical industrial organization suggests that profitability differences are caused by industry-specific factors. Revisionist and managerial approaches, however, are stressing the predominant importance of firm-specific factors. Empirical evidence is more pronounced for firm-related factors, but recent inquiry also found support for the superiority of industry effects. The present paper examines the discriminating power of the industry variable to separate a German firm sample into homogeneous industry subgroups. The finding is that the industry does not have a significant influence on the dispersion of firm profit rates. Thus, the firm-effect approach to profitability is corroborated.  相似文献   
79.
80.
    
Accounting and environmental management both hold improved resource‐use efficiency as an ultimate goal, but intermediate processes and objectives vary and consequently it is separately assessed within each discipline. This paper intends to make visible the globalizing trends in accounting practice, which aim to standardize financial reporting to produce comparable information so that shareholders can maximize their economic wealth. This paper seeks to contrast this comparability strategy with the apparent need for diversity in accounting information exhibited by actual accounting practices, the information needs of environmental management and, ultimately, the cultural needs of sustainable development. We argue that a more pluralistic model, that enables a holistic assessment of corporate performance and balances diverse stakeholder objectives, is better suited to an uncertain future. Implementation requires accountants and environmental managers jointly to create and test a new order of reporting. There are many practical challenges but most significantly accountants and environmental managers must combine to enhance the visibility and credibility of these diverse performance measures. Copyright © 2002 John Wiley & Sons, Ltd. and ERP Environment  相似文献   
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