An Eye for an Eye Will Make the Whole World Blind: Conflict Escalation into Workplace Bullying and the Role of Distributive Conflict Behavior

The current study investigated how work-related disagreements—coined as conflicts—relate to workplace bullying, from the perspective of the target as well as the perpetrator. We hypothesized a positive indirect association between task conflicts and bullying through relationship conflicts. This process accounted for both for targets and perpetrators of bullying. Targets are distinguished from perpetrators in our assumption that this indirect effect is boosted by distributive conflict behavior, being yielding for targets and forcing for perpetrators. Results in a large representative sample of the Flemish working population (N = 2,029) confirmed our hypotheses. Additionally, our study also revealed a direct effect from task conflicts to bullying in the analyses regarding the indirect as well as the conditional indirect effects. For perpetrators, both the indirect and direct relationships are moderated by forcing, underlining the importance of distributive conflict behavior particularly for the enactment of bullying behaviors.     

Identification, screening and stereotyping in labour market discrimination

According to social-psychological research, feelings of uncertainty in decision-making evoke two opposite responses: (i) reduction of uncertainty by information search, leading to less stereotyping of people, and hence less discrimination; (ii) social identification with an ingroup, inducing more reliance on stereotypic perceptions and prejudices, and hence more discrimination against an outgroup. We integrate both responses in a microeconomic model of hiring and pay decisions by an employer. Increasing competition in the product market makes the employer feel more uncertain about his profits, but also raises the opportunity cost of screening expenditures. This elicits substitution of ingroup identification for screening expenditures, and hence enhances discrimination.     

An empirical assessment of assortative matching in the labor market

In labor markets with worker and firm heterogeneity, the matching between firms and workers may be assortative, meaning that the most productive workers and firms team up. We investigate this with longitudinal population-wide matched employer–employee data from Portugal. Using panel data methods, we quantify a firm-specific productivity term for each firm, and we relate this to the skill distribution of workers in the firm. We find that there is positive assortative matching, in particular among long-lived firms. Using skill-specific estimates of an index of search frictions, we find that the results can only to a small extent be explained by heterogeneity of search frictions across worker skill groups.     

Selection effects in auctions for monopoly rights

We demonstrate that auctioning market licenses may result in higher market prices than assigning them via more random allocation mechanisms. When future market profit is uncertain, winning an auction is like winning a lottery ticket. If firms differ in risk attitudes, auctions select the least risk-averse firm, which, in turn, set a higher price (or a higher quantity, in case quantity is the decision variable) in the marketplace than an average firm.     

Local Office Rent Dynamics

This study applies rent adjustment models for ten major European office markets. We capture long-run equilibrium relationships of demand and supply variables and their short-term corrections in a two equation error correction model. We test whether the local nature of office markets makes a model based on national economics inaccurate if local and national markets do not move in tandem. For this we employ a unique dataset, which includes both disaggregated and national variables to model changes in real prime rents for a group of premier and second tier office market cities across Europe for the period 1990–2006. We explicitly compare results that are derived from models that include different levels of geographic aggregation. Results of the two stage error correction model indicate that international office rents adjust to short-run changes in office related economic activity, lagged rent changes, and to the deviation of rents from their long-run values. At the same time our results offer no proof that error correction mechanism models for office rents improve significantly by specifying economic growth figures beyond the national aggregated level for the cities included in our analysis.     

Spatial planning of offshore wind farms: A windfall to marine environmental protection?

Wind farms are often planned offshore where wind conditions are favourable and the visual impact is less important. Wind farms have both positive and negative effects on the marine environment. Negative effects include bird collisions, underwater sounds and electromagnetic fields, whilst positive effects constitute functioning as artificial reef and acting as no-take zones for fish, with possible spill-over effects.This paper presents a spatially explicit framework to analyze effects of wind farms on the marine environment and aims to evaluate how wind farms can contribute to protection of the marine environment through strategic and economically viable location choices.The functioning and the applicability of the model are demonstrated in a numerical example for the Dutch exclusive economic zone. We find that the careful spatial planning of wind farms is a key factor for profitability and environmental protection, and that, if carefully planned, the environment can benefit from offshore wind farms.     

Scenarios based on sustainability discourses: Constructing alternative consumption and consumer perspectives

This paper describes a research based scenario project on sustainable consumption in Belgium. In the Consentsus project a scenario method was developed and tested by the research team to assess scenarios both as learning and participation tools for sustainable consumption. By using a decomposition analysis a solid ground was laid to adequately summarize three guiding principles on how to reach a (more) sustainable consumption: eco-efficiency, de-commodification and sufficiency. These ‘pure’ strategies – showing significant similarities with concrete discourses – were then translated into a participative process: two expert-driven workshops and interim research yielded three future images of food consumption as well as indications on their boundary conditions. These three images reflect significantly diverging approaches on how to organize practices related to food consumption. This structural diversity allowed us to address an archetypical consumer, i.e. a generalized consumer based on the specificities of the scenarios. These consumer perspectives do not aim at indicating real (even potential) groups, but aim at illustrating how the environment of interactions around the consumer fundamentally changes throughout the three sustainability discourses. It is argued that thinking through alternative modes of consumption is of importance to support and elucidate debate in governance arenas that address transitions towards a more sustainable consumption.     

Financial optimisation of forest-level harvest scheduling in Ireland – A case study

World-wide, forest managers have long recognised the benefits of using optimisation-based modelling techniques to improve decision-making. With no such systems in operation in Irish forestry, optimisation-based economic models were developed for harvest scheduling on a forest level within the context of a hierarchical approach. These new techniques were compared to those currently employed by Coillte Teoranta (the Irish Forestry Board). The development of the optimisation models involved the evaluation of: different management options strategies, optimisation techniques, model types and constraint strategies. Evaluation of the models was carried out in Clonbrock forest (294.8 ha), a typical Irish plantation forest, owned and managed by Coillte. The application of the selected model resulted in an increase in net present value (NPV) over the 5-year planning period of 14.2% compared to the NPV produced by Coillte's current process.     

Health and work of the elderly: subjective health measures,reporting errors and endogeneity in the relationship between health and work

This paper explores the interrelation between health and work decisions of older workers. For this, two issues are of relevance. Firstly, health and work may be endogenously related because of direct causal effects of health on work and vice versa, and because of unobservables that may affect both observed health and work outcomes. Secondly, social surveys usually contain self‐assessed health measures and research indicates that these may be subject to endogenous, state‐dependent reporting bias. A solution to the ‘Health and Retirement Nexus’ therefore requires an integrated model for work decisions, health production and health reporting mechanisms. We formulate such a model and estimate it on a longitudinal dataset of older Dutch males. Copyright © 2009 John Wiley & Sons, Ltd.     

Disconnecting graphs by removing vertices: a polyhedral approach

In this paper, we consider the problem of disconnecting a graph by removing as few vertices as possible, such that no component of the disconnected graph has more than a given number of vertices. We give applications of this problem, present a formulation for it, and describe some polyhedral results. Furthermore, we establish ties with other polytopes and show how these relations can be used to obtain facets of our polytope. Finally, we give some computational results.