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821 items in total found

Journal Articles | 2018

Proactive vs. reactive order-fulfillment resource allocation for sea-based logistics

Seyed Shahab Mofidi, Jennifer A. Pazour, and Debjit Roy

Transportation Research Part E: Logistics and Transportation Review

We study proactive and reactive sea-based order-fulfillment decisions for a set of SKUs. In such systems, a proactive strategy may be more costly than a reactive strategy and variable marginal costs change with respect to an activity profile. We derive the optimal sets of SKUs and their quantities to handle prior (proactive strategy) or after (reactive strategy) demand materializes. Counterintuitive results show the proactive set may not necessarily include the high-demanded SKUs. This work extends the newsvendor model by analyzing negative marginal shortage costs. The model is illustrated with historical data from a sea-based logistics military application.

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Journal Articles | 2018

Networks of information exchange: Are link formation decisions strategic?

Pritha Dev

Economic Letters

This paper presents an empirical investigation into whether the decision to form a link with a node takes into account how well connected that node is. Given data in the form of a random sample from a network, this paper proposes a novel way to measure the degree of a node to adjust for mismeasurement and also controls for the endogeneity of this variable. It is shown that in fact the probability of forming a link with a node is increasing in the links received by that node but decreasing or unaffected by the links made by that node.

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Journal Articles | 2018

Group identity in a network formation game with cost sharing

Pritha Dev

Journal of Public Economic Theory

This paper introduces the choice of group identity, which is comprised of characteristics and commitments to these characteristics, in a network formation model where links costs are shared. Players want to link to the largest group given that linking costs for players of the same (different) characteristic are decreasing (increasing) in their commitments. The equilibrium concepts used are Nash equilibrium as well as one that looks for stability allowing for bilateral negotiations. Conditions are shown under which the endogenous choice of characteristics and commitments allow for multiple groups with segregated or connected networks. When group identity is partly endogenous, such that characteristics are fixed and players only choose commitment, it is shown that the equilibrium population commitment profile dictates whether the resulting network is segregated or connected. When group identity is fully endogenous, it is shown that multiple groups and segregated networks are possible equilibrium outcomes but such outcomes are not stable unless the group size additionally affects the costs of link formation.

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Journal Articles | 2018

Power, subjectivity and context in workplace bullying, emotional abuse and harassment: insights from postpositivism

Premilla D’Cruz, Ernesto Noronha, and Pamela Lutgen-Sandvik

Qualitative Research in Organizations and Management: An International Journal

Workplace bullying encompasses subtle and/or obvious negative behaviours embodying aggression, hostility, intimidation and harm. Generally characterized by persistence, these unwelcome acts are displayed by an individual and/or group to another individual and/or group at work, privately and/or publicly, in real and/or virtual forms (D’Cruz, 2015). Alternatively known as workplace emotional abuse or workplace harassment (and referred to as such henceforth), workplace bullying falls under the rubric of dysfunctional and counterproductive workplace behaviours (Fox and Spector, 2005) and is captured by metaphors of nightmares, demons, slaves and heart-brokenness (Tracy et al., 2006) which underscore its unbelievable, demoralizing, humiliating and damaging nature (Lutgen-Sandvik, 2005). It is not surprising, then, that workplace bullying is described as unethical behaviour which goes against universal social rules of acceptability (Ramsay et al., 2011).

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Journal Articles | 2018

Target experiences of workplace bullying on online labour markets: Uncovering the nuances of resilience

Premilla D’Cruz and Ernesto Noronha

Employee Relations

Purpose

The purpose of this paper is to report a study of bullying on online labour markets (OLMs), highlighting how abuse unfolds in digital workplaces and depicting the trajectory of target resilience.

Design/methodology/approach

Adopting van Manen’s hermeneutic phenomenology, targets’ lived experiences of bullying on OLMs was explored. Data gathered from Indian freelancers located on Upwork via conversational telephonic interviews were subjected to sententious and selective thematic analyses.

Findings

The core theme of “pursuing long-term and holistic well-being” showed how targets tapped into yet augmented their resilience while navigating the features of OLMs as they coped with their experiences of bullying. The interface between targets’ internal and external resources, including platform support, vis-à-vis the concreteness and permanence of the site as targets asserted agency, sought control and realized positive outcomes while preserving their reputation, relationality, success and continuity was captured. It may be noted that bullying in digital workplaces is exclusively virtual in form.

Research limitations/implications

Alongside theoretical generalizability, statistical generalizability of the findings should be established.

Practical implications

Recommendations for action for platforms and targets are forwarded. In particular, the critical role of formal workplace support in influencing employee resilience is emphasized.

Originality/value

The paper makes several pioneering contributions. First, it reports the first empirical inquiry examining bullying in digital workplaces. Moreover, OLM research on abuse and harassment has not been undertaken so far. Second, it furthers theorization of resilience, especially with regard to workplace antecedents. Apart from identifying the new organizational antecedent of formal workplace support, it uncovers the complexities of resilience. Third, it extends knowledge on workplace cyberbullying, positive outcomes of workplace bullying and OLMs in India.

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Journal Articles | 2018

Abuse on online labour markets: targets' coping, power and control

Premilla D’Cruz and Ernesto Noronha

European Journal of Operational Research

Purpose

The purpose of this paper is to report a study of targets’ experiences of cyberbullying on online labour markets (OLMs). In addition to highlighting the link between targets’ coping and power and control, the paper compares conventional and digital workplaces.

Design/methodology/approach

The method of critical hermeneutic phenomenology is used in the inquiry, bringing political and applied dimensions into the study. Targets’ lived experiences, developed as case studies, were explored via conversational interviews. Thematic analysis was undertaken ideographically, followed by ideology-critique at a nomothetic level. Adopting the psychological/behavioural lens of coping theory, ideology-critique identified micro-level schemas and macro-level ideologies that perpetuate target disenfranchisement. Critical hermeneutic phenomenology illuminates the mutuality between individual and social processes, opening new doors to address power inequities through emancipation.

Findings

Hermeneutic phenomenology uncovered the core theme of “pursuing holistic and long-term well-being”, capturing targets’ attempts at working through their experiences of bullying without jeopardising their position on the OLM. Ideology-critique went beyond highlighting problem-focussed and emotion-focussed coping strategies that empowered targets to indicate how participants’ mindsets, anchored in ongoing circumstantial discourses and long-standing social cognitions, inhibited them from questioning the status quo and exploring alternative coping strategies like legislation and collectivisation, thereby curbing their agency. The findings were theorised in terms of power and control vis-à-vis the unique attributes of workplace cyberbullying, comparing and contrasting conventional and virtual workplaces.

Research limitations/implications

The inquiry is limited to the Upwork platform. Including other OLMs will enhance theoretical generalisability.

Practical implications

The study feeds into praxis by alerting digital workers in general and targets in particular about their circumstances, setting the stage for mobilisation.

Originality/value

The study makes several pioneering contributions. First, it reports the first empirical inquiry examining bullying in digital workplaces, importantly, also extending knowledge on cyberbullying across conventional versus digital workplaces. Moreover, OLM research on abuse and harassment has not been undertaken so far. Second, methodologically, the inquiry illustrates the combination of hermeneutic phenomenology with ideology-critique, taking the rare steps of joining ontological perspectives conventionally viewed as divergent and of incorporating a largely neglected micro-level focus into ideology-critique. Third, it furthers theoretical insights into power and control in workplace bullying while drawing links with coping.

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Journal Articles | 2018

Multiple allocation hub interdiction and protection problems: Model formulations and solution approaches

Prasanna Ramamoorthy, Sachin Jayaswal, Ankur Sinha, and Navneet Vidyarthi

European Journal of Operational Research

In this paper, we present computationally efficient formulations for the multiple allocation hub interdiction and hub protection problems, which are bilevel and trilevel mixed integer linear programs, respectively. In the hub interdiction problem, the aim is to identify a subset of r critical hubs from an existing set of p hubs that when interdicted results in the maximum post-interdiction cost of routing flows. We present two alternate ways of reducing the bilevel hub interdiction model to a single level optimization problem. The first approach uses the dual formulation of the lower level problem. The second approach exploits the structure of the lower level problem to replace it by a set of closest assignment constraints (CACs). We present alternate sets of CACs, study their dominance relationships, and report their computational performances. Further, we propose refinements to CACs that offer computational advantages of an order-of-magnitude compared to the one existing in the literature. Further, our proposed modifications offer structural advantages for Benders decomposition, which lead to substantial computational savings, particularly for large problem instances. Finally, we study and solve large scale instances of the trilevel hub protection problem exactly by utilizing the ideas developed for the hub interdiction problem.

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Journal Articles | 2018

Effective feedback for millennials in new organizations

Prantika Ray and Manjari Singh

Human Resource Management International Digest

Purpose

This paper aims to understand aspects of feedback given to the millennial generation, particularly in new organizations.

Design/methodology/approach

This paper is based on a review of existing literature from journals and magazines. The perspectives discussed in this paper have been substantiated with discussions with practicing line and HR managers. This paper has been further developed after conducting informal discussions with employees and their supervisors (both millennials and non-millennials). However, the synthesized perspectives expressed here are those of the authors.

Findings

The millennial generation has characteristics that relate to receiving feedback. Key aspects discussed in this paper are the purpose of feedback, formal versus informal methods, short versus long-term orientation, frequency, hierarchical relationships, and technology.

Practical implications

With the increasing entry of millennials into the workforce, organizations need to focus on the mechanisms and environments for effective feedback.

Originality/value

This paper is timely given the rising number of millennials entering the workforce. This work looks into the mechanisms for effective performance feedback, as well as creating a facilitating environment with the focus on employee development.

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Journal Articles | 2018

An integrated decision support system for strategic supply chain optimisation in process industries: The case of a zinc company

Goutam Dutta, Narain Gupta, Goutam Dutta, and Manoj K. Tiwari

International Journal of Production Research

We introduce a menu-driven user-friendly decision support system (DSS) for supply chain planning based on optimisation. The DSS is based on a multi-source (supplier), multi-destination (warehouse) network having multiple manufacturing facilities, with multiple materials and multiple storage areas. This integrated supply chain model performs multiple period planning. The use of this DSS requires little knowledge of management sciences tools. We discuss the need for an integrated approach towards supply chain modelling for the process industry. We present the integrated model in the form of a database structure. We validate the model with the real data of a zinc company and demonstrate the impact of optimisation in terms of percentage improvement. The result shows that it is possible to improve unit contribution to profit from 1.89 to 4.66%.

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Journal Articles | 2018

The effects of volunteerism on self-deception and locus of contro

Naman Desai, Sharvari Dalal, and Saurabh Rawal

International Journal of Voluntary and Nonprofit Organizations

This study examines whether volunteering for not-for-profit Organizations (NPOs) which are involved in providing social welfare services and which actively promote sociobehavioral factors like social responsibility, leadership, and self-confidence among its volunteers, reduces an individual’s likelihood of engaging in corrupt practices. We identify two psychological traits: propensity to rationalize (as evidenced by self-deception) and an external locus of control (as compared to an internal LOC) that facilitate unethical behavior. With the help of volunteers from two NPOs, we investigate whether engaging in social welfare activities organized by such NPOs would create awareness about the adverse consequences of corruption faced by large segments of the society, which in turn would make it difficult to rationalize unethical and corrupt acts. Additionally, most NPOs actively strive to develop self-confidence and leadership skills among its volunteers. Prior literature indicates that individuals possessing such qualities are more likely to have an internal LOC and also that individuals possessing an internal LOC are less likely to act in a corrupt manner. The overall results indicate that greater experience with such NPOs leads to a significant reduction in propensity to rationalize and leads to a higher likelihood of having an internal LOC.

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IIMA