过度金融化产生的道德风险

从更为宏观和历史的眼光看,这次美国金融危机是全球经济过度金融化的后果。所谓金融化,即经济活动的重心从产业部门转向金融部门,集中到金融资产的管理、流动和增值上来,金融资产的增长速度超过甚至远远高于实体经济的发展速度。以美国为例,依托于房地产、股票和债券等金融资产炒作的产业在GDP中的占比从1950年的11．3%上升到2007年的20．67％。     

影响新疆少数民族农村富余劳动力转移就业障碍的分析

由于语言、文化习俗、社会历史原因导致新疆少数民族农村富余劳动力向城市转移缓慢,就业困难,贫困现象普遍.尤其是南疆地区,城市化进程严重滞后,富余劳动力人口大量聚集.作为“三农”问题和城市化研究的热点,探讨并最终解决新疆农村劳动力的特殊主体——少数民族富余劳动力转移就业存在的障碍,对于新疆农民增收,南疆农民脱贫,缩小南北疆区域经济差距,实现新疆全面小康社会目标具有决定性影响.     

From schoolyard to workplace: The impact of bullying on sales and business employees' machiavellianism,job satisfaction,and perceived importance of an ethical issue

Bullying can precipitate many negative outcomes at work, but previous research does not adequately address how such misbehavior affects employee dispositions and attitudes; how these characteristics impact ethical decision making is also underexplored. Given these research gaps, the purpose of this study is to assess (1) the impact of bullying on Machiavellianism and job satisfaction, and (2) the influences of Machiavellianism and job satisfaction on perceived ethical issue importance, a measure of ethical decision making. Three hundred eighty‐four sales and business employees working for different firms operating in the United States answered a self‐report questionnaire. The findings showed that, after accounting for social desirability bias, workplace bullying was positively associated with Machiavellianism and negatively associated with job satisfaction. Machiavellianism was negatively related to the perceived importance of an ethical issue embedded in a vignette highlighting Machiavellianism and latent bullying behaviors. In addition, job satisfaction was positively related to ethical issue importance. Finally, both Machiavellianism and job satisfaction mediated the relationship between bullying experiences and importance of an ethical issue, as evidenced by their significant indirect effects. HR professionals should minimize bullying and Machiavellianism to reduce the corrosive effect on the ethical environment and enhance work attitudes and ethical decisions.     

CHILD CARE PRICES AND MATERNAL EMPLOYMENT: A META‐ANALYSIS

The literature estimates for labor force participation elasticity with regard to child care prices are extensive and varying. While some estimates imply substantial gains from child care subsidies, others find insignificant effects. To determine the causes of the variance, this paper reviews and analyzes the elasticity sizes using estimates from 36 peer‐reviewed articles and working papers in the literature. We start by reviewing the theoretical and empirical aspects related to participation elasticity with regard to child care costs, paying special attention to sample characteristics, methodological aspects, and macro level factors. We conclude by providing a meta‐regression using control variables based on our review of the literature to explain some of the differences between the estimates. As research builds on and improves the methods and assumptions in prior works, elasticity estimates have become smaller over time. This decline might also be partially explained by changes in labor market characteristics. In countries with high rates of part‐time work and very high or very low rates of female labor force participation, we find elasticity rates to be smaller.     

基于数字图像处理技术的再生混凝土数值模拟

为了研究骨料形态对再生混凝土材料力学性能的影响,基于势能原理的基面力元法,利用图像处理技术和MATLAB软件,建立了再生混凝土真实骨料细观模型。应用FORTRAN分析软件对再生混凝土试件进行单轴拉伸试验的数值模拟,研究了真实骨料细观模型再生混凝土宏观应力-应变曲线变化规律和试件的破坏形态。结果显示,真实骨料模型得到的宏观应力-应变曲线和试验曲线吻合度较高,骨料形状对试件的破坏形态影响较小。模型可真实地模拟再生混凝土在单轴拉伸作用下的损伤破坏过程,准确地反映试件的实际骨料形态。     

余能原理基面力元法在桁架弹塑性分析中的应用

基面力元法(BFEM)是一种新型的有限单元法,是以"基面力"来描述一点的应力状态。为了编制适用于桁架弹塑性分析的MATLAB基面力元程序,以余能原理基面力元法为基础,将基面力元法的平面4节点的实体单元模型向桁架单元进行退化,列出了退化桁架单元的柔度矩阵、单元轴力和节点位移的具体表达式,并对其控制方程进行了必要的处理。根据退化的桁架单元模型,采用增量法的思想和线性强化弹塑性模型,以三杆超静定桁架和复杂静定桁架为算例进行了计算。将计算结果与大型有限元分析软件ABAQUS的T2D2计算结果进行了对比分析,发现所用方法与ABAQUS的计算结果高度吻合,进一步验证了基面力理论的正确性和程序的适用性。     

Establishing the validity of cycle path capacity assumptions in the Highway Capacity Manual

Cycle mode share increase is widely desired, but highway design practitioners lack the numerical tools to deliver infrastructure, instead relying on design standards and intuition, with little literature basis. As a case in point, the US Highway Capacity Manual (which is well used internationally) has developed levels of service for cycle infrastructure that are, at their core, based on an assumption of noninteraction between multiple cyclists. This paper uses a modified implementation of the Social Force Model to test the validity of this assumption. Necessary changes such as the consideration of acceleration characteristics and minimum maintainable speed are included. The resulting model produces valid outcomes in keeping with established traffic flow properties, reflecting three-phase traffic flow theory and the ability for the stochastic elements in traffic flow to cause flow breakdown. The developed simulation indicates that there is a fundamental difference in outcome if cyclists are assumed to have a fixed speed versus one they can change given their surroundings. This difference in outcomes is found to exist within the range of literature design flow capacities for bicycle infrastructure and also yields emergent outcomes that align closely with those known behaviors of highway vehicles, which intuitively transfer to cyclists. These findings reinforce the standing need for large-scale empirical studies to determine the basic numerical and behavioral parameters for cyclists, upon which all design ultimately rests.     

Sustainable travel writing? Exploring the ethical dilemmas of twenty-first-century travel writers

There is a paucity of academic literature on travel writing that examines travel writers and their perceived influence on sustainability. This article addresses this lacuna by exploring how travel writers understand their responsibilities and reflects on ethics in their profession, particularly in how foreign destinations and cultures are portrayed. This is significant because some travel writers have been accused of contributing to what interviewees called the “Lonely Planet Syndrome”, the notion that writing about a place will introduce and encourage mass tourism, changing the original state of the place for the worse. In this qualitative, phenomenological study, data were collected from 23 in-depth interviews with twenty-first-century travel writers and analysed using an Interpretive Phenomenological Analysis. Findings suggest that while some interviewees expressed anxiety about their perceived accountability to mediate foreign cultures responsibly, others embraced their role as a cultural mediator. They cared about local cultures and wanted to write in responsible ways by supporting more sustainable outcomes, reflected in the themes of cross-cultural understanding, socio-cultural and environmental advocacy and promoting benefits of tourism to communities. Future studies could include exploring the role of travel editors, travel writers’ professional knowledge and the growing role of travel blogs.     

Contesting authentic practice and ethical authority in adventure tourism

This paper examines the discourses of authenticity and ethics employed by adventure tourists regarding the use of the natural environment. In one case, full-time traveling rock climbers use their dedication to the sport and annual visits to the Red River Gorge as evidence for their authoritative voice on ethical climbing practice. While they identify the growing numbers of leisure climbers as a problem for sustainability, many also take up temporary employment as guides and are directly involved in the introduction of new climbers to the area. In another case, two groups of wilderness enthusiasts – “ADK 46ers” and “Summit Stewards” – lament the environmental and social impacts of other recreational users in the Adirondack Park. Despite being visitors themselves, Summit Stewards and 46ers use their sense of place and knowledge of Adirondack history and ecology to substantiate their authority as purveyors of ethical practice. In both cases, senses of responsibility are inspired by senses of place, but are articulated through notions of authenticity and used as justification for ethical authority. While validating their presence in these outdoor spaces, the use of such rhetoric also minimizes their own impacts yielding further tensions among user groups.     

Proximity and animal welfare in the context of tourist interactions with habituated dolphins

The long-term sustainability of wildlife tourism depends on integrating visitor demands with resource management, requiring an understanding of tourist motivation. Managing the conflict between access to the animals and welfare, however, may diminish the experience for tourists. This paper identifies trade-offs tourists are willing to make between access and animal welfare, associated with feeding habituated bottlenose dolphins (Tursiops sp.) in Monkey Mia, Western Australia. Using a choice modelling technique, we were able to determine monetary values of visitor experiences. Compared to the current guaranteed interaction with dolphins (and a daily resort entrance fee), respondents were willing to pay significantly higher hypothetical entrance fees to avoid a decrease in proximity to, or probability of, the dolphin interaction. However, negative impacts on dolphin welfare had a negative impact on visitor utility. Over 80% of visitors (n = 244) accepted management regulations resulting in decreased time with and proximity to dolphins, if those addressed welfare concerns and were communicated clearly. Thus, while visitors placed the greatest value on the proximity and predictability, they were willing to trade off these aspects if they improved dolphin welfare. We provide management suggestions based on these results.