Hyun‐cheol Paul Choi  James D. Blocher  Srinagesh Gavirneni 《Production and Operations Management》2008,17(6):614-625

New developments in corporate information technology such as enterprise resource planning systems have significantly increased the flow of information among members of supply chains. However, the benefits of sharing information can vary depending on the supply chain structure and its operational characteristics. Most of the existing research has studied the impact of sharing downstream information (e.g., a manufacturer sharing information with its suppliers). We evaluate the benefits of sharing upstream yield information (e.g., a supplier sharing information with the manufacturer) in a two‐stage serial supply chain in which the supplier has multiple internal processes and is faced with uncertain output due to yield losses. We are interested in determining when the sharing of the supplier's information is most beneficial to the manufacturer. After proposing an order‐up‐to type heuristic policy, we perform a detailed computational study and observe that this information is most beneficial when the supplier's yield variance is high and when end‐customer demand variance is low. We also find that the manufacturer's backorder‐to‐holding cost ratio has little, if any, impact on the usefulness of information.  相似文献   

    

Su‐Yol Lee  Robert D. Klassen 《Production and Operations Management》2008,17(6):573-586

The limited capabilities and resources available within many small‐ and medium‐sized enterprises frequently hamper an effective response to environmental pressures, which in turn hurts large buying firms (i.e., customers). Using a case study method with multiple suppliers of two large buying firms, we mapped factors that initiated and improved environmental capabilities in small‐ and medium‐sized enterprises over time. Through several specific mechanisms, buyers' green supply chain management initiated and then enabled the improvement of suppliers' environmental capabilities. Independent of buyers, internal championing of environmental concerns also provided an impetus for small‐ and medium‐sized enterprise suppliers to acquire resources outside the supply chain. Thus, synergistic linkages emerged in supportive buyer‐supplier relationships, resource acquisition, and capability development. When these findings are combined with earlier research on larger suppliers, an integrative framework emerges that provides direction for suppliers, buyers, and public agencies seeking to improve environmental performance.  相似文献   

    

Audrey Williams‐Lee 《Global Business and Organizational Excellence》2008,27(4):15-31

The fast‐food giant played catch‐up after unprecedented top management turnover drew down its pool of high‐potential “ready now” leaders. By aggressively focusing on talent management and leadership development, the company now has a tempting selection of accelerated leadership development programs for high potentials, and is rapidly building bench strength around the globe. The evolution of its efforts began with its first leadership competency model and the integration of key talent processes. Regional, functional, and global leadership development initiatives soon followed, along with a rigorous companywide talent planning process. The company is now turning its attention to high potential talent at lower organizational levels. © 2008 Wiley Periodicals, Inc.  相似文献   

    

Fabien Gagnon  Mathieu Courchesne  Benoît Lévesque  Pierre Ayotte  Jean‐Marc Leclerc  Jean‐Claude Belles‐Isles  Claude Prévost  Jean‐Claude Dessau 《Risk analysis》2008,28(5):1221-1230

The present study was aimed at assessing the health consequences of the presence of radon in Quebec homes and the possible impact of various screening programs on lung cancer mortality. Lung cancer risk due to this radioactive gas was estimated according to the cancer risk model developed by the Sixth Committee on Biological Effects of Ionizing Radiations. Objective data on residential radon exposure, population mobility, and tobacco use in the study population were integrated into a Monte‐Carlo‐type model. Participation rates to radon screening programs were estimated from published data. According to the model used, approximately 10% of deaths due to lung cancer are attributable to residential radon exposure on a yearly basis in Quebec. In the long term, the promotion of a universal screening program would prevent less than one death/year on a province‐wide scale (0.8 case; IC 99%: –3.6 to 5.2 cases/year), for an overall reduction of 0.19% in radon‐related mortality. Reductions in mortality due to radon by (1) the implementation of a targeted screening program in the region with the highest concentrations, (2) the promotion of screening on a local basis with financial support, or (3) the realization of systematic investigations in primary and secondary schools would increase to 1%, 14%, and 16.4%, respectively, in the each of the populations targeted by these scenarios. Other than the battle against tobacco use, radon screening in public buildings thus currently appears as the most promising screening policy for reducing radon‐related lung cancer.  相似文献   

    

Louis‐Paul Rivest 《Revue canadienne de statistique》2008,36(1):75-84

The author is concerned with log‐linear estimators of the size N of a population in a capture‐recapture experiment featuring heterogeneity in the individual capture probabilities and a time effect. He also considers models where the first capture influences the probability of subsequent captures. He derives several results from a new inequality associated with a dispersive ordering for discrete random variables. He shows that in a log‐linear model with inter‐individual heterogeneity, the estimator N is an increasing function of the heterogeneity parameter. He also shows that the inclusion of a time effect in the capture probabilities decreases N in models without heterogeneity. He further argues that a model featuring heterogeneity can accommodate a time effect through a small change in the heterogeneity parameter. He demonstrates these results using an inequality for the estimators of the heterogeneity parameters and illustrates them in a Monte Carlo experiment  相似文献   

    

Sophie Véran  Jean‐Dominique Lebreton 《Revue canadienne de statistique》2008,36(1):85-98

Conservation biology aims at assessing the status of a population, based on information which is often incomplete. Integrated population modelling based on state‐space models appears to be a powerful and relevant way of combining into a single likelihood several types of information such as capture‐recapture data and population surveys. In this paper, the authors describe the principles of integrated population modelling and they evaluate its performance for conservation biology based on a case study, that of the black‐footed albatross, a northern Pacific albatross species suspected to be impacted by longline fishing  相似文献   

    

Zhenlin Yang  Eden Ka‐Ho Wu  Anthony F. Desmond 《Revue canadienne de statistique》2008,36(2):301-319

The authors propose a simple but general method of inference for a parametric function of the Box‐Cox‐type transformation model. Their approach is built upon the classical normal theory but takes parameter estimation into account. It quickly leads to test statistics and confidence intervals for a linear combination of scaled or unsealed regression coefficients, as well as for the survivor function and marginal effects on the median or other quantité functions of an original response. The authors show through simulations that the finite‐sample performance of their method is often superior to the delta method, and that their approach is robust to mild departures from normality of error distributions. They illustrate their approach with a numerical example.  相似文献   

    

Ayse Saka‐Helmhout 《英国管理杂志》2007,18(3):294-310

This article explores the impact of institutional variation on the extent to which subsidiary firms learn from multinational corporations. Learning is conceptualized here as consisting of two aspects: knowledge flow and reinforcement of or change in routines to incorporate the behaviourist assumptions of learning into the international business field. The research is based on in‐depth case studies that systematically compare the ways in which parent company knowledge diffuses to Polish, Turkish, Italian and German subsidiary firms in the chemical industry. The findings show that even though firms face the same global pressure to integrate and pursue the same international strategy, their learning outcomes are not the same. There is heterogeneous learning as a result of differences in the institutional context of home countries. Where institutional structures are not favourable to learning, the proactive or reactive orientation of actors to identifying future needs and modifying existing schemata – which highlight the importance of human agency – is significant in explaining learning.  相似文献   

    

Josep Pijoan‐Mas 《Journal of the European Economic Association》2007,5(5):987-1015

Habit formation has been proposed as a possible solution to the equity premium puzzle. This paper extends the class of models that support the habits explanation in order to account for heterogeneity in earnings, wealth, habits, and consumption. I find that habit formation does indeed increase the equity premium. However, contrary to earlier results, the habit hypothesis does not imply a price for risk as largeas the one measured in the data. There are three reasons for this. First, households in a habits economy modify their consumption/savings decision. Second, they modify their portfolio choice. These two changes in behavior diminish the consumption fluctuations faced by households. Third, the composition of the set of agents pricing risk in the economy changes so that relatively better self‐insured households end up pricing risk. (JEL: D52, G12, E21, C68)  相似文献   

    

Fridrik M. Baldursson  Nils‐Henrik M. von der Fehr 《Journal of the European Economic Association》2007,5(1):37-65

We consider an intertemporal policy game between changing governments that differ in their attitudes towards a particular feature of market outcomes, exemplified with environmental pollution. When in power, a government will choose policy instruments and set strictness of regulation with a view to influencing the policy of future, possibly different, governments. We demonstrate that a “brown” government favours emission quotas over effluent taxes, as quotas establish property rights that are costly to reverse. Conversely, a “green” government prefers to regulate by taxes, in order to limit the incentives of future brown governments to ease regulations. Strategic behaviour tends to exaggerate policy differences (making green governments greener and brown governments browner) compared to when such strategic considerations were not an issue. (JEL: D81, D9, H23, L51, Q28, Q38)  相似文献