‘Let's share!’ The mediating role of employees' self-determination in the relationship between transformational and shared leadership and perceived knowledge sharing among peers

Building on social-exchange and self-determination theory, this study aimed to contribute to the scholarly literature on leadership and knowledge sharing by simultaneously testing how shared and transformational leadership and their interrelatedness may foster employees' perceptions of knowledge sharing behaviour among peers. Additionally, we investigated the mediating role of employees' basic psychological needs satisfaction (in terms of autonomy, competence and relatedness, respectively) as an additional explanatory mechanism to reveal how shared and transformational leadership may foster individuals' perceptions of knowledge sharing behaviour among peers. We employed PLS structural equation modelling to analyse survey data obtained from professionals in an R&D unit of a knowledge-intensive firm. We found shared leadership to be the most important factor enhancing employees' perceptions of knowledge sharing among peers, both directly and indirectly through employees' satisfaction of the need for autonomy. Transformational leadership was found to foster employees' knowledge sharing ultimately, through shared leadership and the need for autonomy satisfaction. We concluded that shared forms of leadership supplemented with transformational leadership on the part of formal leaders are important in contemporary work environments as they can foster employees' perceptions of knowledge sharing among peers and contribute towards employees' self-determination, which ultimately enhances perceptions of knowledge sharing among peers.     

A two-phase algorithm for bin stretching with stretching factor 1.5

Online Bin Stretching is a semi-online variant of bin packing in which the algorithm has to use the same number of bins as an optimal packing, but is allowed to slightly overpack the bins. The goal is to minimize the amount of overpacking, i.e., the maximum size packed into any bin.We give an algorithm for Online Bin Stretching with a stretching factor of 1.5 for any number of bins. We build on previous algorithms and use a two-phase approach. However, our analysis is technically more complicated and uses amortization over the bins with the help of two weight functions.     

找到自己的“最适客户”

每个营销者都梦想发现未经染指或需求未得到充分满足的大规模客户群体,并为其开发正中下怀的产品何乐而不为呢?该公司(姑且称之为“普罗公司”)拥有世界一流的市场研究人员,能够熟练使用人群统计、心理测验和统计分析方面的最新工具。每过两三年,他们就会搬出一项雄心勃勃的调查计划,用来确定具有吸引力的大型客户群体以及大量诱人的“市场空白点”,以便     

The cost of selfishness for maximizing the minimum load on uniformly related machines

Consider the following scheduling game. A set of jobs, each controlled by a selfish agent, are to be assigned to m uniformly related machines. The cost of a job is defined as the total load of the machine that its job is assigned to. A job is interested in minimizing its cost, while the social objective is maximizing the minimum load (the value of the cover) over the machines. This goal is different from the regular makespan minimization goal, which was extensively studied in a game theoretic context. We study the price of anarchy (poa) and the price of stability (pos) for uniformly related machines. The results are expressed in terms of s, which is the maximum speed ratio between any two machines. For uniformly related machines, we prove that the pos is unbounded for s>2, and the poa is unbounded for s≥2. For the remaining cases we show that while the poa grows to infinity as s tends to 2, the pos is at most 2 for any s≤2.     

Performance Assessments of Nuclear Waste Repositories: A Dialogue on Their Value and Limitations

Performance Assessment (PA) is the use of mathematical models to simulate the long-term behavior of engineered and geologic barriers in a nuclear waste repository; methods of uncertainty analysis are used to assess effects of parametric and conceptual uncertainties associated with the model system upon the uncertainty in outcomes of the simulation. PA is required by the U.S. Environmental Protection Agency as part of its certification process for geologic repositories for nuclear waste. This paper is a dialogue to explore the value and limitations of PA. Two skeptics acknowledge the utility of PA in organizing the scientific investigations that are necessary for confident siting and licensing of a repository; however, they maintain that the PA process, at least as it is currently implemented, is an essentially unscientific process with shortcomings that may provide results of limited use in evaluating actual effects on public health and safety. Conceptual uncertainties in a PA analysis can be so great that results can be confidently applied only over short time ranges, the antithesis of the purpose behind long-term, geologic disposal. Two proponents of PA agree that performance assessment is unscientific, but only in the sense that PA is an engineering analysis that uses existing scientific knowledge to support public policy decisions, rather than an investigation intended to increase fundamental knowledge of nature; PA has different goals and constraints than a typical scientific study. The proponents describe an ideal, six-step process for conducting generalized PA, here called probabilistic systems analysis (PSA); they note that virtually all scientific content of a PA is introduced during the model-building steps of a PSA; they contend that a PA based on simple but scientifically acceptable mathematical models can provide useful and objective input to regulatory decision makers. The value of the results of any PA must lie between these two views and will depend on the level of knowledge of the site, the degree to which models capture actual physical and chemical processes, the time over which extrapolations are made, and the proper evaluation of health risks attending implementation of the repository. The challenge is in evaluating whether the quality of the PA matches the needs of decision makers charged with protecting the health and safety of the public.     

Translating Bourdieu into youth studies

ABSTRACT

Against a backdrop of lively discussion about the best ways to do youth studies, or sociology of youth, this article asks: Can Pierre Bourdieu’s work be translated into youth studies in ways that benefit the field? We begin by considering Bourdieu’s thoughts on the category of ‘youth’ using a new translation of this text, and then turn to an important discussion by Furlong, Woodman, and Wyn about certain long standing tensions in youth studies. These tensions are between writers engaging in the ‘structure versus agency’ debate that is mapped onto the ‘culture versus transitions’ binary. We consider the case for adopting a ‘middle-ground’ represented by Bourdieu’s writings. We argue that many in youth studies work from an unacknowledged substantialist tradition, which is contra to Bourdieu's relational perspective. The result includes misunderstandings of Bourdieu's thinking and expectations of his work, for example, that it can pass certain empirical tests. We argue that if Bourdieu's relational perspective is to be translated into youth studies, we will need a more determined effort to understand that perspective first.     

Political demand and policy advice: a framework for analysis

ABSTRACT

In the policy advice literature, there has been two main “waves” of research focus. In the first wave, the focus of scholarly attention tended to focus on single policy advice actors. A key innovation was offered by Halligan, who sought to frame policy advice within a policy advisory system, with a focus on government control and location. In later research, Craft and Wilder called for a “second wave” of research which also sought to integrate factors such as policy content, context, ideational compatibility but also reflect the increasingly polycentric advice landscape. This article contributes to the second wave drawing attention to a key element of the institutional dynamics of policy advice systems, namely the issue of political “demand”. A core argument offered in this article is that the dynamics of demand need to be interrogated more fully, and be given greater prominence in current understandings of PAS dynamics. The net effect of marginalizing “demand” factors is that it can de-politicize the extent and nature of advice-giving, and reduce it to a seeming technocratic exchange. To expand our understanding of demand, this paper offers a framework for understanding the dynamics of demand within policy advice systems.     

The Association Between Individual Income and Remaining Life Expectancy at the Age of 65 in the Netherlands

This article quantifies the association between individual income and remaining life expectancy at the statutory retirement age (65) in the Netherlands. For this purpose, we estimate a mortality risk model using a large administrative data set that covers the 1996–2007 period. Besides age and marital status, the model includes as covariates individual and spouse’s income as well as a random individual specific effect. It thus allows for dynamic selection based on both observed and unobserved characteristics. We find that conditional on marital status, individual income is about equally strong and negatively associated with mortality risk for men and women and that spouse’s income is only weakly associated with mortality risk for women. For both men and women, we quantify remaining life expectancy at age 65 for low-income individuals as approximately 2.5 years less than that for high-income individuals.     

Spline interpolation for demographic variables: The monotonicity problem

In demography, it is often necessary to obtain a monotonic interpolation of data. A solution to this problem is available using the Hyman filter for cubic splines. However, this does not seem to be well known amongst demographers, and no implementation of the procedure is readily available. We remedy these problems by outlining the relevant ideas here, and providing a function for the R language.