Retail change: effects on employees' job demands and home life

Causes and effects of occupational stress have received research attention for several decades, with increasing focus during the 1990s as organizations and individual workers attempt to adapt to economic change. Stress arising from either the work or home domain can have a variety of outcomes in the workplace, and similarly can impact in many ways on relationships and activities at home. This paper reports the first phase of a research study to identify the impact on work and home life of changes in retailing, a sector of the economy which has experienced significant change over the past few years. A qualitative methodology was adopted, using group discussions to allow staff to identify the specific changes in retailing most important for themselves, and then to explore how these changes related to satisfactions and dissatisfactions at work, and their impact on general aspects of home life. The results suggest that the 'spillover' relationship between work and home stress seems to be the most useful in describing the impact of change. This suggests that additional role demands at work brought about by change have an impact on relationships and social life outside work. However, some individuals described instances of 'compensation' between work and home, and independence between the two domains. This suggests that the issue of stress in the home/work interface is complex, and that the demands in each domain may be positively or negatively related depending on characteristics of the demands themselves, or may vary according to individual characteristics of the people in the study.     

医疗护理服务可及性对居家老人照料服务选择的影响研究——基于北京市的实证研究

利用课题组2018年在北京市的抽样调查数据,运用Logistic回归方法考察医疗护理服务可及性对居家老人照料服务选择的影响。结果发现,医疗护理服务的便捷性、可支付性与老人照料服务的选择显著相关。住所附近有医疗卫生机构、有提供上门护理服务的机构或是与家庭医生签约的老人,更倾向于选择社会照料服务;支付能力对照料服务的选择呈现"U"型效应:家庭支付能力较强或者经济自评相对不足的老人更倾向于选择社会照料服务。应通过优化医疗护理资源布局、建立并完善社会照料服务的价格机制等措施,推进高效、可持续的社会照料服务体系的构建。     

Sharing the value‐at‐risk under distributional ambiguity

This paper considers the problem of risk sharing, where a coalition of homogeneous agents, each bearing a random cost, aggregates their costs, and shares the value‐at‐risk of such a risky position. Due to limited distributional information in practice, the joint distribution of agents' random costs is difficult to acquire. The coalition, being aware of the distributional ambiguity, thus evaluates the worst‐case value‐at‐risk within a commonly agreed ambiguity set of the possible joint distributions. Through the lens of cooperative game theory, we show that this coalitional worst‐case value‐at‐risk is subadditive for the popular ambiguity sets in the distributionally robust optimization literature that are based on (i) convex moments or (ii) Wasserstein distance to some reference distributions. In addition, we propose easy‐to‐compute core allocation schemes to share the worst‐case value‐at‐risk. Our results can be readily extended to sharing the worst‐case conditional value‐at‐risk under distributional ambiguity.     

Effects of employees’ opportunities to influence in-store music on sales: Evidence from a field experiment

The effects of in-store music on consumer behavior have attracted much attention in the marketing literature, but surprisingly few studies have investigated in-store music in relation to employees. By conducting a field experiment in eight Filippa K fashion stores in Stockholm, Sweden, we investigate whether it is beneficial for store owners to give employees more opportunities to influence the in-store music. We randomly assigned the stores into a treatment group and a control group, with the employees in the treatment stores having the opportunity to influence the in-store music through an app developed by Soundtrack Your Brand (SYB). The experiment lasted 56 weeks and sales data were also gathered 22 weeks before the experiment, resulting in a total of 4626 observations. Our results show that sales decreased by 6% when the employees had the opportunity to influence the music played in the store, and the effect is driven by a reduction in sales of women's clothing. Interviews with the employees revealed that they had diverse music preferences, frequently changed songs, and preferred to play high-intensity songs. Employees thus seem to make choices regarding the in-store music that reduce sales, implying that store owners might want to limit their opportunities to influence the background music.     

如何做好食品检验检测工作

随着社会物质文明的发展,人们越来越关注食品安全。食品作为人类生存和发展的必要资源,在社会生活中占有重要的地位。近年来,食品质量和食品安全逐渐成为人们关注的热门话题,如何通过先进的食品检测技术确保食品安全,成为食品研究领域的一大热门。在现代社会环境下,食品检验是一项十分重要的工作。     

HIGH‐ORDER SHORT‐TIME EXPANSIONS FOR ATM OPTION PRICES OF EXPONENTIAL LÉVY MODELS

The short‐time asymptotic behavior of option prices for a variety of models with jumps has received much attention in recent years. In this work, a novel second‐order approximation for at‐the‐money (ATM) option prices is derived for a large class of exponential Lévy models with or without Brownian component. The results hereafter shed new light on the connection between both the volatility of the continuous component and the jump parameters and the behavior of ATM option prices near expiration. In the presence of a Brownian component, the second‐order term, in time‐t, is of the form , with d₂ only depending on Y, the degree of jump activity, on σ, the volatility of the continuous component, and on an additional parameter controlling the intensity of the “small” jumps (regardless of their signs). This extends the well‐known result that the leading first‐order term is . In contrast, under a pure‐jump model, the dependence on Y and on the separate intensities of negative and positive small jumps are already reflected in the leading term, which is of the form . The second‐order term is shown to be of the form and, therefore, its order of decay turns out to be independent of Y. The asymptotic behavior of the corresponding Black–Scholes implied volatilities is also addressed. Our method of proof is based on an integral representation of the option price involving the tail probability of the log‐return process under the share measure and a suitable change of probability measure under which the pure‐jump component of the log‐return process becomes a Y‐stable process. Our approach is sufficiently general to cover a wide class of Lévy processes, which satisfy the latter property and whose Lévy density can be closely approximated by a stable density near the origin. Our numerical results show that the first‐order term typically exhibits rather poor performance and that the second‐order term can significantly improve the approximation's accuracy, particularly in the absence of a Brownian component.     

出口玩具产品质量安全源头管理系统的设计

在对产品源头质量安全理论分析的基础上,运用J2EE技术研究、开发了出口玩具产品质量安全源头管理系统,并阐述了源头管理系统的建立模式、软件架构、系统总体功能模块设计和实现途径。本系统契合了检验检疫监管工作的需要,符合检验检疫对出口玩具产品质量安全源头管理要求并能满足企业自身需求。     

Marketing perspectives on digital business models: A framework and overview of the special issue

Strong digital developments are changing markets, and firms may adopt a digital business model to deal with these developments. This special issue focuses on such digital business models. In this editorial, we discuss the relevance of digital business models, propose a conceptual framework, and discuss how digital business models affect firms, firm performance, and markets. We introduce the papers in this issue and show how they each fit within the conceptual framework. We discuss four important areas for future research.     

Well-being effects of self-employment: A spatial inquiry

Our paper presents an empirical analysis of entrepreneurial well-being using a large-scale longitudinal household survey from the UK that tracks almost 50,000 individuals across seven waves over the period 2009–2017, as well as a number of exploratory case studies. We contribute to the existing literature by investigating how entrepreneurial well-being varies across locations along the urban-rural continuum, and across wealthy-deprived neighbourhoods. We use a Coarsened Exact Matching (CEM) approach to compare the well-being outcomes of individuals who switch into self-employment from waged employment, and show that entrepreneurial well-being, in the form of job satisfaction, is significantly higher for those living in semi-urban locations, relative to those living in urban and rural locations. We argue that semi-urban locations provide an optimal combination of ease of doing business and quality of life. Our results also show that individuals in wealthy neighbourhoods who switch into self-employment experience higher job satisfaction than otherwise comparable individuals living in materially deprived neighbourhoods, although the latter experience greater levels of life satisfaction following the switch.     

Forget about ‘the ideal worker’: A theoretical contribution to the debate on flexible workplace designs,work/life conflict,and opportunities for gender equality

This study integrates insights from Self-Determination Theory and Boundary Theory to present scenarios on how flexible workplace designs can trigger multiple motivational processes underlying gendered work/nonwork integration behaviors, and how these affect work/life conflict. We disentangle processes underlying work engagement and work/life conflict, explaining the paradoxical outcomes found with regard to gender inequality in terms of work/life performance, satisfaction, and health. Policy makers and organizations need an increased understanding and a reconceptualization of these issues, realizing that the ideal worker does not exist. Instead, a long-term perspective is needed in order to truly realize the potential benefits of flexible workplace designs for all stakeholders. Organizations need to take responsibility for preventing individual workers’ depletion and stimulating the regeneration of workers’ resources.