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51.
This article describes the application of decision rules from financial portfolio theory to the evaluation of product lines. The focus is on the risk/return implications of an “add” decision to the total portfolio versus the individual product. Multiple criteria approaches that aid product line evaluations are also presented. 相似文献
52.
Interconnection in Network Industries 总被引:4,自引:0,他引:4
Recent deregulation of telecommunications in the U.S. and elsewhere has highlighted the importance of interconnection in network industries. In this paper, we analyse interconnection in a deregulated network where the participants compete in the final retail market. We consider both the case of a mature industry as well as one where a new entrant challenges the incumbent. In the later case, network externalities allow the incumbent to use the terms of interconnection to maintain its dominant position. Moreover, in either case, competition in the retail market can be undermined by collusion over access prices. We discuss the implications for some of the provisions of the new U.S. Telecommunications Act, specifically mandatory interconnection and reciprocity of tariffs, comparing these to the simple bill and keep rule. 相似文献
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In the last decade the literature has recorded several works concerned with the applications of network flow-like models to the area of manpower planning, and specifically the management manpower training program to assure that supply will meet the demand. Because the system which these models attempt to describe and/or decisions which they prescribe are rather complex in the real world, each of these models has imbedded in them certain simplifying assumptions. On the other hand, each incorporates different aspects of what is real. This paper develops a taxonomy of the landmark developments in this area. The taxonomical schema is then used to unify the models in consideration of the decision factors used. The schema envisions a general model containing all the factors which are explicitly or implicitly considered in the existing literature as being germane. The schema lends itself to both the identifying of those models which might be of interest and not available in the literature on the one hand and it shows in bold relief the similarities and differences between existing models. 相似文献
56.
We consider a semiparametric competing risk model given by k independent survival times. The paper offers an asymptotic treatment of tests for the semiparametric null hypothesis of equality of the underlying risks. It turns out that modified rank tests are asymptotically efficient for certain semiparametric submodels, where the baseline hazard is a nuisance parameter. In addition, the asymptotic relative efficiency of the present tests is derived. A comparison of asymptotic power functions can then be used to classify various tests proposed earlier in the literature. For instance a chi-square type test is efficient for proportional hazards. Data driven tests of likelihood ratio type are proposed for cones of alternatives. We will consider certain stochastically increasing alternatives as a special example. The paper shows how the concept of local asymptotic normality of Le Cam works for hazard oriented models. 相似文献
57.
Organizationally Sensible vs. Legal-Centric Responses to the Eroding Employment At-Will Doctrine 总被引:1,自引:1,他引:0
Most private sector American employers have responded to the uncertainty created by the erosion of the employment at-will doctrine by adopting tactics aimed at avoiding the perceived costs associated with salient legal concerns (e.g., requiring written agreements to preserve the at-will relationship and defeat implied-contract claims). This article discusses the limitations of such a highly legal-centric approach, and provides an alternative decision framework that will promote more strategic, or organizationally sensible, employer responses. In addition to providing specific guidance for employers facing the employment at-will issue, the article's analysis and discussion illustrates a general approach that has relevance wherever organizational decision makers address employment decisions with potential legal implications. 相似文献
58.
Venture Capitalists, Business Angels, and Performance of Entrepreneurial IPOs in the UK and France 总被引:2,自引:0,他引:2
Salim Chahine Igor Filatotchev Mike Wright 《Journal of Business Finance & Accounting》2007,34(3-4):505-528
Abstract: Using a unique sample of 444 entrepreneurial IPOs in the UK and France, this paper analyses the investment patterns and the stock-market performance effects of two types of early stage investors: venture capitalists (VCs) and business angels (BAs). Extending existing research, we identify important endogeneity and institutional effects. Our findings indicate that UK IPOs have a higher retained ownership and lower participation ratio by BAs, but a lower retained ownership and participation ratio by VCs than in France. BA and VC investments are substitutes, and they are endogenously determined by a number of firm- and founder-related factors, such as founder ownership and external board 'interlocks', and underwriter reputation. UK VCs are effective third-party certifying agents who reduce underpricing in UK IPOs, whereas in French IPOs they increase it by appearing to engage in grandstanding. This certification effect is more significant in UK IPOs involving both high VC and BA ownership. Finally, underpricing increases with VC participation ratio, where the higher exit of VCs seems to increase the risk premium required by outside investors, in particular in the UK. 相似文献
59.
Summary. This paper investigates the characteristics of the optimal posted price in the standard sequential search paradigm. Much
of the intuition gleaned from the extensive sequential search literature in which the seller adopts a reservation price does
not carry over to the posted price setting. For example, an increase in buyer valuations can lead to a reduction in the optimal
posted price. We do, however, provide sufficient conditions on the hazard rate function h which ensure that an increase in demand induces an increase in the optimal posted price. As exhibited herein, the analysis
of the posted price model depends critically upon analytical properties of h. Amongst the issues treated are the elasticity of demand, finite horizon, sale of multiple units, and competitive equilibrium.
Received: October 21, 1999; revised version: March 7, 2000 相似文献
60.
Yousef Abdulsalam Mohan Gopalakrishnan Arnold Maltz Eugene Schneller 《Journal of Business Logistics》2015,36(4):335-339
Providing health care involves a complex enterprise, and the trade‐off between quality and cost has been particularly stark compared to other industries. However, a recent focus on health sector supply networks is now producing significant innovations and improvements. This Special Topic Forum illustrates for the academic and practitioner community how health care supply chain research can benefit from our evolving understanding of supply chains and help push that understanding even further. We classify health care supply chain research into two broad categories—supply chain in health care and supply chain of health care—to set an agenda for future research. 相似文献