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排序方式: 共有434条查询结果,搜索用时 15 毫秒
71.
72.
This paper presents a methodology for analysis of system dynamics models of social systems. The methodology consists of computational algorithms Specifically, the computational techniques of sensitivity analysis as extended to system dynamics models are shown to enhance an understanding of model behavior and to contribute to considerations of model validity, whereas optimization analyses are shown to contribute to model utility and policy formulation. 相似文献
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74.
The paper develops a cost frontier model of electricity distribution and estimates it on data for the 12 regional electricity companies of England and Wales. It is found that some significant cost drivers in cross-section estimation are insignificant when the model is estimated on panel data, highlighting the well-known drawbacks of cross-section estimation. Panel data estimation suggests that the main determinants of distribution operating costs are the number of customers in the area and simultaneous maximum demand. These results and the efficiency rankings of the companies are not sensitive to changes in error distribution assumptions and sample size. There is also significant evidence of economies of scale. There is a small but significant effect on cost efficiency from privatization, but this is as likely to be due to the changes in accounting policies at the time of privatization as any real effect. 相似文献
75.
John Aloysius Cary Deck Amy Farmer 《International Journal of the Economics of Business》2012,19(1):25-51
Technological advances enable sellers to identify relationships among offered goods. Sellers can leverage this information through pricing strategies such as bundling and sequential pricing. While these strategies have primarily been studied under monopoly assumptions, the strategies are available to competitive firms as well. This paper reports on a series of laboratory experiments comparing bundling and sequential pricing while varying the underlying relationship between the goods in markets where a fraction of buyers comparison shop. The results indicate that sequential pricing is generally as profitable to the seller; however, there is evidence that sequential pricing may be more harmful to consumers than bundling when the goods have complementary values or the buyer’s values are positively correlated. 相似文献
76.
Do actions speak louder than words? An empirical investigation of corporate environmental reputation
Charles H. Cho Ronald P. Guidry Amy M. Hageman Dennis M. Patten 《Accounting, Organizations and Society》2012
In this study, we investigate the extent to which firms’ environmental performance is reflected in perceptions of their environmental reputation and whether environmental disclosure serves to mediate the negative aspects of poorer environmental performance associated with those assessments. We also examine whether differences in environmental performance and environmental disclosure appear to be associated with membership selection to the Dow Jones Sustainability Index (DJSI), a factor we also believe may be associated with perceptions of environmental reputation. Based on a cross-sectional sample of 92 US firms from environmentally sensitive industries, we find that environmental performance measured using Trucost environmental performance scores is negatively related to both reputation scores and membership in the DJSI. We argue this is due to the more extensive disclosure levels of firms that are worse performers and the finding of a significant positive relation between environmental disclosure and both the environmental reputation measures and DJSI membership. Finally, we show that the DJSI designation positively influences perceptions of corporate reputation. Overall, our results suggest that voluntary environmental disclosure appears to mediate the effect of poor environmental performance on environmental reputation. Perhaps more troubling, our results also suggest that membership in the DJSI appears to be driven more by what firms say than what they do. Thus, like voluntary disclosure, the DJSI may actually be hindering improved future corporate environmental performance. 相似文献
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78.
Women make important contributions to household food production in sub‐Saharan Africa. Women's agricultural productivity is often reduced, however, by inefficient intrahousehold allocation of agricultural resources. Complex marital structures found in polygynous households may complicate resource allocation. Using three waves of the Tanzania Living Standards Measurement Survey–Integrated Survey on Agriculture, we measure the effect of the marital structure, wife position, and plot management on agricultural productivity and input allocations. We find evidence of cooperation within polygynous households. Plots managed by husbands and wives in polygynous households produce more valuable crops, have higher yields, and are more likely to use fertilizer than their monogamous counterparts. Within polygynous households, we observe that plots jointly managed by husbands, first wives, and second wives (together) have significantly more family labor than plots managed by husbands and first wives. This result may provide evidence of different production technologies across plot managers within the same households. 相似文献
79.
Skye Allmang Judy Jou Adva Gadoth Veronika Rozhenkova Amy Raub Jody Heymann 《International Journal of Training and Development》2019,23(4):276-290
This article provides an analysis of laws across all 193 United Nations countries that protect workers from discrimination in access to employer‐provided training. We assessed the overall level of protection and the characteristics most commonly protected, as well as the extent of variation across geographic regions and country income. Overall, 60% of countries were found to offer specific protections from discrimination in access to training for at least one of the seven protected characteristics, which was significantly less than the percentage of countries offering protections from discriminatory hiring or terminations. Gender was the most commonly protected characteristic, whereas sexual orientation was least commonly protected. These findings suggest that employer‐provided training is less well‐protected from discrimination when compared with other aspects of employment and that there is variation in protection across socio‐demographic characteristics and geographic regions. Additional legislation may be needed to ensure equitable access to training for all workers. 相似文献
80.
This study addresses a call for the design and implementation of course curricula that prepare students to develop their CQ and gain experience working with peers on global virtual project teams. We explored how US-based and Peru-based students’ cultural intelligence (CQ) impacted their sense of psychological safety (PS) during a month-long global, virtual team project. We also examined the students’ people-focused (PF) and task-focused (TF) behaviors as mediators of the CQ-PS relationship. The results of mediation analyses provide support for our hypothesis that the relationship between cultural intelligence and psychological safety will be mediated by people-focused behaviors. Finally, we provide a model and suggestions for virtually bringing together students from different countries to collaborate on a global virtual project, and avenues for future research. Here we encourage a focus on a curriculum that educates students about their cultural intelligence and ways to develop psychologically safe learning environments. We also highlight the potential learning for faculty teaching such courses, and note how our experience collaborating with our counterpart in Peru constituted a fractal of what our students were experiencing on their global projects. 相似文献