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51.
We study the deterministic optimization problem of a profit-maximizing firm which plans its sales/production schedule. The firm controls both its production and sales rates and knows the revenue associated to a given level of sales, as well as its production and storage costs. The revenue and the production cost are assumed to be respectively concave and convex. In Chazal et al. [Chazal, M., Jouini, E., Tahraoui, R., 2003. Production planning and inventories optimization with a general storage cost function. Nonlinear Analysis 54, 1365–1395], we provide an existence result and derive some necessary conditions of optimality. Here, we further assume that the storage cost is convex. This allows us to relate the optimal planning problem to the study of a backward integro-differential equation, from which we obtain an explicit construction of the optimal plan. 相似文献
52.
Marie‐Françoise Calmette 《Review of International Economics》2008,16(5):874-892
This paper examines the effects of trade liberalization on merger behavior. We endogenize merger choice among owners in an oligopolistic industry in asymmetric countries to analyze the consequences of trade cost reductions on competitiveness and welfare. In this context, the non‐cooperative game supports asymmetric market structures. We also find that trade liberalization is not necessarily pro‐competitive in countries with the competitive advantage, even if trade costs are completely abolished. Moreover, the tariff‐jumping explanation of international mergers does not necessarily apply. The welfare analysis shows that merger behavior can significantly alter any gains from liberalization. Countries should consider enforcing competition in regional agreements. Specifically, to avoid a reduction in domestic welfare following trade‐liberalizing reductions in trade costs, a high‐cost country's optimal policy may be to ban international mergers. 相似文献
53.
Evidence is provided from changes in deposit insurance premiums in the early 1990s on the validity of the premium absorption hypothesis and the premium shifting hypothesis. Analysis of abnormal market returns associated with deposit insurance events using a market‐model event‐study methodology suggests that reductions in deposit insurance premiums are associated with increases in the market value of banking organizations; conversely, increases in deposit insurance premiums are associated with decreases in market wealth. The largest banks in the sample and banks with low equity capital (and low risk‐based capital ratios) appear to be most affected. These results are generally consistent with the premium absorption hypothesis but inconsistent with the premium shifting hypothesis. 相似文献
54.
The diversifying power of inflation-linked (IL) bonds relative to traditional asset classes has changed significantly. In this paper, we study the dynamics of conditional volatilities and correlations for three asset classes, IL bonds, nominal bonds and equities, in the USA and Europe. Using a DCC-MVGARCH for the period 1997–2007, we highlight the change that took place in 2003. Although IL bonds once had definite diversification power, they are now highly correlated with nominal bonds and have reached similar volatility levels. As a result, the two asset classes are practically substitutable. This seems to be due to more stable inflation expectations and to a more liquid IL bond market. Although diversification was a valuable reason for introducing IL bonds in a global portfolio before 2003, this is no longer the case. Dynamic portfolio optimisation using our estimates of conditional correlations and volatilities clearly demonstrates that the optimal weight of IL bonds in a portfolio decreased sharply in 2003 in favour of nominal bonds and equities. 相似文献
55.
Individual assessment involves one psychologist making an assessment of an individual for personnel-related purposes. Individual assessment practice is reviewed, and research on reliability is presented. A study examining the comparability of conclusions reached by consumers is presented. Eighty-six students and thirty-eight managers read nine narrative assessment reports (three of each of three job candidates) and attempted to determine which reports described the same candidate. None of the subjects could correctly group the nine reports; a sizeable proportion did no better than chance in grouping the reports. Implications for assessors and consumers of individual assessments are discussed. 相似文献
56.
The labor market effects of foreign owned firms 总被引:2,自引:0,他引:2
Rita Almeida 《Journal of International Economics》2007,72(1):75-96
Foreign firms have a more educated workforce and pay higher wages than domestic firms even after controlling for worker quality, at a given moment in time. This does not imply that foreign ownership improves the labor market outcomes of the workers since foreign investment may be guided by unobservable firm and worker characteristics correlated with schooling or wages. This paper asks whether foreign investors acquire firms with high human capital or wages, or whether foreign acquisition improves these outcomes. Using a matched employer-employee data set, I find that foreign acquisitions of domestic firms have small effects on the human capital and on average wages of the acquired firms. Instead, foreign investors “cherry pick” those domestic firms that are already very similar to the group of existing foreign firms. 相似文献
57.
Experiments in real life often involve comparisons of test treatments to more than one control. However, the controls may not always be of equal importance. In this paper we introduce weighted MV optimality criterion and present a detailed study using both weighted A and MV optimality criteria, of the problem of optimally comparing a set of test treatments to two controls (positive and a negative) that are of unequal importance to the experimenter. 相似文献
58.
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60.
Marie Hutchinson Margaret H. Vickers Lesley Wilkes Debra Jackson 《Employee Responsibilities and Rights Journal》2009,21(3):213-229
This paper reports findings from the first, qualitative stage of a national sequential, mixed method study of bullying in
the Australian nursing workplace. Twenty-six nurses who had experience of workplace bullying were recruited from two Australian
public sector health care organizations. Examining the narrative data from the viewpoint of bullying being a corrupt activity
we present an alternative perspective on group acts of bullying. By exploring bullying as corrupt behaviour, this paper challenges
the assumption that bullying can be principally considered a series of isolated events stemming from interpersonal conflict,
organizational pressures, or poor work design. Corruption in organizations has not previously been linked with or compared
to bullying. In revealing the manner in which actors can engage in corrupt conduct that includes bullying, the findings from
our study offer important implications for the management of workplace bullying as a serious and corrupt activity. 相似文献