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Permanent URI for this collectionhttps://hdl.handle.net/20.500.14288/3
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Publication Metadata only Production and energy mode control of a production-inventory system(Elsevier, 2023) Karabag, Oktay; Khayyati, Siamak; Department of Business Administration; Tan, Barış; Department of Business Administration; College of Administrative Sciences and EconomicsEnergy efficiency in manufacturing can be improved by controlling energy modes and production dy-namically. We examine a production-inventory system that can operate in Working, Idle, and Off energy modes with mode-dependent energy costs. There can be a warm-up delay to switch between one mode to another. With random inter-arrival, production and warm-up times, we formulate the problem of de-termining in which mode the production resource should operate at a given time depending on the state of the system as a stochastic control problem under the long-run average profit criterion considering the sales revenue together with energy, inventory holding and backlog costs. The optimal solution of the problem for the exponential inter-arrival, production and warm-up times is determined by solving the Markov Decision Process with a linear programming approach. The structure of the optimal policy for the exponential case uses two thresholds to switch between the Working and Idle or Working and Off modes. We use the two-threshold policy as an approximate policy to control a system with correlated inter-event times with general distributions. This system is modelled as a Quasi Birth and Death Process and analyzed by using a matrix-geometric method. Our numerical experiments show that the joint pro-duction and energy control policy performs better compared to the pure production and energy control policies depending on the system parameters. In summary, we propose a joint energy and production control policy that improves energy efficiency by controlling the energy modes depending on the state of the system.Publication Metadata only Enabling older employees' well-being through HR attributions: the moderating role of management context(Wiley, 2024) Department of Business Administration; Aksoy, Eda; Marcus, Justin; Department of Business Administration; College of Administrative Sciences and EconomicsFusing the extant literature on successful aging at work (SAW) and HR attributions, we examined the confluence of employee-oriented internal HR attributions and unit-level employee management context on burnout for employees across the age spectrum. Time-lagged, multi-level survey data were collected from a sample of 1762 blue-collar employees from 178 work units at the manufacturing plants of a large firm operating in the Turkish energy industry, which is characterized as a high-risk safety environment. A cross-level moderated mediation model was tested using multi-level structural equation modeling (MSEM). Results supported study hypotheses such that the negative association between age and burnout was mediated by employee-oriented positive HR attributions, and this indirect association was moderated by unit-level perceptions of the employee management context. Development-oriented contexts that emphasized personal development/growth-indicated by the degree of emphasis on innovation strategy, safety training, and active unit safety leadership-weakened the negative indirect (i.e., buffering) effect of age on burnout via less positive HR attributions. Conversely, a maintenance-oriented context that emphasized maintaining the status quo-indicated by passive unit safety leadership-strengthened said effect through more positive HR attributions. The theoretical and practical implications of these findings for fostering employee well-being across the age spectrum are discussed.Publication Metadata only LeverAge: a European network to leverage the multi-age workforce(Oxford Univ Press, 2024) Scheibe, Susanne; Kooij, Dorien; Truxillo, Donald M.; Zaniboni, Sara; Abuladze, Liili; Bamberger, Peter A.; Balytska, Mariia; Betanzos, Norma D.; Perek-Bialas, Jolanta; Boehm, Stephan Alexander; Burmeister, Anne; Cabib, Ignacio; Caon, Maurizio; Deller, Juergen; Derous, Eva; Drury, Lisbeth; Eppler-Hattab, Raphael; Fasbender, Ulrike; Fueloep, Marta; Furunes, Trude; Gerpott, Fabiola H.; Gostautaite, Bernadeta; Halvorsen, Cal J.; Hernaus, Tomislav; Inceoglu, Ilke; Iskifoglu, Mustafa; Ivanoska, Kalina Sotiroska; Kanfer, Ruth; Kenig, Nikolina; Klimek, Sabina; Kunze, Florian; Mertan, Emete Biran; Varianou-Mikellidou, Cleo; Moasa, Horia; Ng, Yin Lu; Parker, Sharon K.; Reh, Susan; Resuli, Vebina; Schmeink, Martina; Silberg, Slavka; Sousa, Ines C.; Steiner, Dirk D.; Stukalina, Yulia; Tomas, Jasmina; Topa, Gabriela; Turek, Konrad; Vignoli, Michela; von Bonsdorff, Monika; Wang, Dahua; Wang, Mo; Yeung, Dannii Yuen-lan; Yildirim, Kemal; Zhang, Xin; Znidarsic, Jana; Department of Business Administration; Marcus, Justin; Al Mursi, Noura; Kıran, Sibel; Department of Business Administration; College of Administrative Sciences and Economics; Graduate School of Business; School of MedicineBringing together 150+ scholars and practitioners from 50+ countries, and funded by the European Commission, COST Action LeverAge (https://www.cost.eu/actions/CA22120/) is the first network-building project of its kind in the work and organizational psychology and human resource management (WOP/HRM) aspects of work and aging. Focused on the aging workforce, the Action aims to foster interdisciplinary and multinational scientific excellence and the translation of science to practical and societal impact across 4 years. Based on a research synthesis, we identify five broad research directions for work and aging science including work and organizational practices for a multi-age workforce, successful aging at work, the integration of age-diverse workers and knowledge transfer, aging and technology at work, and career development in later life and retirement. We provide key research questions to guide scientific inquiry along these five research directions alongside best practice recommendations to expand scholarly impact in WOP/HRM.Publication Metadata only Duality of language as a tool for integration versus mobility at work: utility of a polyphonic perspective(Edward Elgar Publishing Ltd, 2023) Erbil, Cihat; Baglama, Sercan Hamza; Department of Business Administration; Özbilgin, Mustafa; Department of Business Administration; College of Administrative Sciences and EconomicsN/APublication Metadata only Technical efciency in banks: a review of methods, recent innovations and future research agenda(Springer Heidelberg, 2024) Abdou, Hussein A.; Hayek, Ali I.; Nwachukwu, Jacinta C.; Elamer, Ahmed A.; Pyke, Chris; Department of Business Administration; Akdeniz, Özlem Olgu; Department of Business Administration; College of Administrative Sciences and EconomicsPublication Metadata only New product introductions with selection of unique and common features in monopoly markets(Pergamon-Elsevier Science Ltd, 2024) Schwarz, Justus Arne; Department of Business Administration; Çelik, Burak; Tan, Barış; Department of Business Administration; ; College of Administrative Sciences and Economics; Graduate School of Sciences and EngineeringFirms have to determine the right features and prices for their new products as they introduce new product generations to the market. We consider the problem of determining the features of a new product that a monopolist will introduce into a market that contains an existing product as well as setting the prices of the existing and the new products. The firm also decides on offering only the new product or both the existing and the new products. We explicitly capture the effects of unique features, which are specific to one of the two products, and common features which are shared between the new and the existing product on these decisions. The problem is formulated as a nonlinear-mixed-integer program with general cost, demand, and price functions. For the case of linear cost, demand, and price, the nonlinear-mixed-integer program is converted to a nonlinear program and solved analytically. Based on this solution, the optimal prices for both products and the optimal unique features for the new product are derived in closed form, a linear-time algorithm is presented to determine the optimal common features, and the optimality conditions of keeping the existing product in the market are characterized. We show that the selection of the unique features, but not the common ones, is based on the difference between a feature's contribution to the product's demand and its cost adjusted by the price sensitivity in the linear case. Moreover, we find that the firm, if it wants to avoid demand cannibalization, should remove the existing product from the market rather than offer two products with mainly unique features. Capturing the effects of unique and common features directly allows firms to decide on the best rollover strategy and determine the right features and pricesPublication Metadata only Supported nondominated points as a representation of the nondominated set: an empirical analysis(Wiley, 2024) Department of Business Administration; Sayın, Serpil; Department of Business Administration; College of Administrative Sciences and EconomicsThe nondominated set of a multiple objective discrete optimization problem is known to contain unsupported nondominated points, which outnumber the supported ones and are more difficult to obtain. We treat supported nondominated points as a representation and analyse their quality using different metrics beyond their sheer numbers. Under different data generation schemes on multiobjective knapsack and assignment problems, we observe that supported nondominated points almost always provide a good representation of the entire nondominated set.Publication Metadata only Knowledge processes and learning outcomes in MNCs: an empirical investigation of the role of HRM practices in foreign subsidiaries(Wiley, 2009) Simonin, Bernard L.; Department of Business Administration; Tunalı, Ayşegül Özsomer; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 108158By examining the case of American and European firms operating in Japan, this article contributes to the central debate of how and when multinational corporations (MNCs) learn from their foreign subsidiaries. Through structural equation modeling, we assess how specific human resource management (HRM) practices (critical thinking encouragement, supervisory encouragement, learning incentives, deployment of internal mechanisms and processes, expatriation, and corporate training) enhance (1) knowledge transfer outflows from the subsidiary to other parts of the MNC and (2) the subsidiary's performance in its local market. We find learning orientation to be a key antecedent of all HRM practices we investigated. From a practical point of view, a noticeable finding relates to the lack of effects of critical thinking encouragement on market knowledge acquisition and dissemination when (1) there is a significant presence of expatriates in the subsidiary and (2) when local managers have access to training programs at headquarters (HQ) and other affiliates.Publication Metadata only Feeling attached to symbolic brands within the context of brand transgressions(Emerald, 2015) Sayin, Eda; Department of Business Administration; Canlı, Zeynep Gürhan; Faculty Member; Department of Business Administration; College of Administrative Sciences and Economics; 16135Purpose We propose that brands with strong associations and dedicated customers may be vulnerable if customers perceive them as exploiting their relationship. Methodology/approach - We start by reviewing the literature on brand meaning, brand attachment, brand relationships, and brand transgressions. The extant literature implies that as a result of their willingness to sustain their brand relationship, highly attached consumers will either discount negative information about a brand or attribute the responsibility for the negative information to some external factors. We propose, on the other hand, that when negative information dilutes the reason for brand attachment, the norm of the consumer brand relationship is violated (brand transgression). Then we argue that highly attached consumers of that brand will react more negatively (when compared to consumers not feeling highly attached) toward the brand. Findings We introduce a typology of brand transgressions against the (1) expressive, (2) exclusive, (3) expert, and (4) empathic nature of brands. We discuss the possible effects of attachment levels on consumers' reactions after such brand transgressions. Additionally, we articulate the moderating effects of four consumer motives (need for self-enhancement, need for uniqueness, need for risk avoidance, and need for justice) on consumer reactions. Originality/value - Our reasoning counters the literature suggesting that highly attached consumers of a brand will engage in relationshipsustaining behaviors. We contribute to the brand-transgression literature by providing a more structured and detailed definition of brand transgressions by classifying them under four distinct types.Publication Metadata only A bourdieuan relational perspective for entrepreneurship research(Wiley, 2014) Tatli, Ahu; Vassilopoulou, Joana; Forson, Cynthia; Slutskaya, Natasha; Department of Business Administration; Özbilgin, Mustafa; Other; Department of Business Administration; College of Administrative Sciences and Economics; N/AIn this paper, we illustrate the possibilities a relational perspective offers for overcoming the dominant dichotomies (e.g., qualitative versus quantitative, agency versus structure) that exist in the study of entrepreneurial phenomena. Relational perspective is an approach to research that allows the exploration of a phenomenon, such as entrepreneurship, as irreducibly interconnected sets of relationships. We demonstrate how Pierre Bourdieu's concepts may be mobilized to offer an exemplary toolkit for a relational perspective in entrepreneurship research.