Faculty of Business

Permanent URI for this communityhttps://hdl.handle.net/10679/4

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An actor-network theory (ANT) approach: analysis of Turkish e-government gateway initiative
(2009) Aykaç, Didem Selcen Öztürkcan; Kervenoael, R. de; Kasap, N.; Eryarsoy, E.; Business Administration; ÖZTÜRKCAN AYKAÇ, Didem Selcen
There are various models proposed in the literature to analyze trajectories of e-Government projects in terms of success and failure. Yet, only the Actor-Network Theory (ANT) perspective (Heeks and Stanforth, 2007) considers the interaction factors among network actors and actants. This paper proposes the ANT for approaching to the Turkish e-Government Gateway initiative as a case study. In doing so, it provides valuable insight in terms of both local and global actornetworks which surround the initiative.
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Aligning sustainable development principles and sectoral education
(Springer, 2018) Özuyar, Pınar Gökçin; Beyhan, Tugce Baykent; Entrepreneurship; ÖZUYAR, Pinar; Beyhan, Tugce Baykent
The competitive environment for new graduates to acquire a well-paid and satisfying job position and the long-standing gap between recent university graduates and business requirements as to the skills of these graduates, lead to the creation of a Sectoral Education Program model, involving seven different courses with various learning methods ranging from guest speakers, industry analyses and case studies to company practicum projects. The Sectoral Education Program model is a mandatory part of the curriculum for business students and electives for all other students university wide. Emphasized by the launch of sustainable development goals and trying to find complementary and comprehensive examples of innovative tools for private sector–university partnerships, this continuously developing model accepted one of the foci of the program as sustainable development and devised solutions that embed the teaching of sustainable development principles aligning them with concerns of business. In the embedded approach, the curriculum regarding local sectoral expertise, the crosscutting issues for all sectors from population dynamics, resource scarcity to climate change and even big data are being discussed. Over the three semesters of teaching local sectoral expertise in the light of crosscutting issues, students’ feedbacks have been recorded. Main results show that for university students the phrase sustainability is being overused but still the connotation to the real-world cannot be established. By embedding sustainable development principles directly aligned with the concerns of business sectors, majority of the students think that this know-how would be a skill for them in their future prospects.
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Analysis of customer switching behavior in omni-channel retailing
(Institute of Industrial and Systems Engineers, IISE, 2020) Cesaret, Bahriye; Bayram, A.; Business Administration; CESARET, Bahriye
Omni-channel retailing is a recent approach that allows customers to purchase products from anywhere and return them anywhere and allows retailers to fulfill orders from anywhere. This flexibility improves the customer experience by integrating all channels, allows retailers to achieve more availability and drives the sales and traffic of the retailers. In this study, we consider two omni-channel implementations: (i) ship-from-store, and (ii) home delivery, by considering customer switching behavior across the sales channels. Store customers can be fulfilled in store or they can ask for home delivery. Online orders, on the other hand, can be shipped either from the fulfillment center or from any other store location that maximizes the overall profit of the retailer. We further consider that both store and online customers can switch across channels. We build a dynamic programming framework to investigate optimal fulfillment decisions for both online and store orders. We incorporate the uncertainty both in demand and in the cost of shipment to individual customers. We present our results through optimal fulfillment strategies and numerical experiments.
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An approximation of stochastic telegraph equations
(AIP Publishing, 2012) Ashyralyev, A.; Akat, Muzaffer; International Finance; AKAT, Muzaffer
In the present paper the two-step difference scheme for the telegraph equation is presented. The convergence estimate for the solution of the difference scheme is established. In applications, the convergence estimates for the solution of difference scheme for the numerical solution of two problems for hyperbolic equations are obtained. The theoretical statements for the solution of this difference scheme are supported by the results of the numerical experiment.
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Big and lean is beautiful: a conceptual framework for data-based learning in marketing management
(Emerald Publishing Limited, 2019-09-19) Soyer, E.; Pauwels, K.; Seggie, Steven Head; Entrepreneurship; Rindfleisch, A.; Malter, A. J.; SEGGIE, Steven Head
While Big Data offer marketing managers information that is high in volume, variety, velocity, and veracity (the 4Vs), these features wouldn't necessarily improve their decision-making. Managers would still be vulnerable to confirmation bias, control illusions, communication problems, and confidence issues (the 4Cs). The authors argue that traditional remedies for such biases don't go far enough and propose a lean start-up approach to data-based learning in marketing management. Specifically, they focus on the marketing analytics component of Big Data and how adaptations of the lean start-up methodology can be used in some combination with such analytics to help marketing managers improve their decision-making and innovation process. Beyond the often discussed technical obstacles and operational costs associated with handling Big Data, this chapter contributes by analyzing the various learning and decision-making problems that can emerge once the 4Vs of Big Data have materialized.
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Bringing sustainability to the heart of a university through teaching, research and service
(EDP Sciences, 2018) Gençtürk, Esra; Mengüç, Mustafa Pınar; Business Administration; Mechanical Engineering; MENGÜÇ, Mustafa Pınar; GENÇTÜRK, Feride Esra
In this short paper, we summarize our targeted efforts at Ozyegin University in Istanbul, Turkey for establishing a sustainable research, teaching and learning environment. The University is striving to have highest level impact on sustainable education, energy, architecture, built environment, business and life-long learning practices. The strategic plan of the University puts the principles of sustainability at the cornerstone of its efforts, with the aim to aspire not only our students and staff, but also the community at large.
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Build-to-order meets global sourcing: planning challenge for the auto industry
(Springer, 2011) Matoğlu, Melda Örmeci; Vande Vate, J.; International Finance; ÖRMECİ MATOĞLU, Melda
Auto manufacturers today face many challenges: The industry is plagued with excess capacity that drives down prices, international competitors are seizing share at both ends of the market and consumers are well informed about options and prices. All these factors combine to heighten competitive pressures, squeeze margins, and leave manufacturers struggling to increase revenues and market share.
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Carrier selection for Less-Than-Truckload (LTL) shipments
(Elsevier, 2021) Konur, D.; Yıldırım, G.; Cesaret, Bahriye; Business Administration; CESARET, Bahriye
This chapter reviews the basics of carrier selection for less-than-truckload (LTL) shipments. First, the impacts of LTL carrier selection on various strategic, tactical, and operational supply chain planning decisions are discussed. Then, the key principles of LTL carriers and the key carrier attributes LTL shippers account for in their selection of LTL carriers are summarized. A numerical study using a continuous review inventory control model under stochastic demand is presented in order to demonstrate the effects of four key LTL carrier attributes (transit time, transit time variability, and freight minimums and maximums) on a shipper's cost and service level.
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Company innovation system: a conceptualization
(Operations and Information Management Group, Aston Business School, Aston University, 2018-04-25) den Hartigh, Erik; Entrepreneurship; Nunes, B.; Emrouznejad, A.; Bennett, D.; Pretorius, L.; HARTIGH, Erık Den
We conceptualize the company as an innovation system that consists of components, relationships and attributes, with the purpose to produce innovation. The systems approach to innovation has received limited attention at the company level. While it is widely accepted for nations, sectors, regions and technologies, and while some company-level foundations and building blocks have been proposed, the dominant approach at company level is to regard innovation as a process. Components of a company innovation system are actors or resources. Relationships refer to the configuration of these components: an innovation process now becomes one of the possible configurations of components in a system. Attributes of a company innovation system are capabilities and other system properties, such as innovative culture or infrastructure. We explore the concept of company innovation system by analyzing and comparing case examples of ABB Group, Adobe Systems, Amazon.com, eBay, Hitachi, HTC, Lockheed Martin, Philips, Qualcomm, Salesforce.com and Southwest Airlines. We find that using the company innovation system approach, we can map innovation systems at the company level. We can identify the components, such as R&D departments, labs, venture organizations, teams, employees, C-level offices and facilitating tools. We can identify relationships such as single or multiple configurations, simple or complex configurations, technology-driven, market-driven or interactive configurations, and open or closed configurations. We can identify attributes such as creativity versus efficiency emphasis, systematic versus non-systematic approaches, adaptiveness of the system, and large project-focus versus experimentation focus. The findings indicate that companies design, configure and coordinate their innovation systems in different ways. Our current findings are tentative and preliminary and only provide descriptive insights of the case examples. A well-conceptualized and validated company innovation system approach may give managers relevant insights to address the problems of designing, configuring and coordinating their company innovation systems. Academically, the company innovation system approach provides complementary insights to the existing company-level innovation approaches.
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Composing offer sets to maximize expected payoffs
(Digital Commons, 2016) Atahan, Pelin; Johar, M.; Sarkar, S.; Sectoral Education and Professional Development; DEMİRCİLER, Pelin Atahan
Firms are increasingly using clickstream and transactional data to tailor product offerings to visitors at their site. Ecommerce websites have the opportunity, at each interaction, to offer multiple items (referred to as an offer set) that might be of interest to a visitor. We consider a scenario where a firm is interested in maximizing the expected payoff when composing an offer set. We develop a methodology that considers possible future offer sets based on the current choices of the user and identifies an offer set that will maximize expected payoffs for an entire session. Our framework considers both the items viewed and purchased by a visitor and models the probability of an item being viewed and purchased separately when calculating expected payoffs. The possibility of a user backtracking and viewing a previously offered item is also explicitly modelled. We show that identifying the optimal offer set is a difficult problem when the number of candidate items is large and the offer set consists of several items even for short time horizons. We develop an efficient heuristic for the one period look-ahead case and show that even by considering such a short horizon the approach is much superior to alternative benchmark approaches. Proposed methodology demonstrates how the appropriate use of information technologies can help e-commerce sites improve their profitability.
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Construction, real estate mortgage market development and economic growth in Turkey
(2016) Erol, Işıl; International Finance; Abdulai, R. T.; Obeng-Odoom, F.; Ochieng, E.; Maliene, V.; EROL, Işıl
In line with the "economic sectors" definition of the Turkish Statistical Institute (2013), it is possible to define the overall real estate (RE) sectors in terms of two main components, the construction industry and other RE business activities.
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Creating a real-life professional experience for undergraduates: sectoral practicum projects
(IATED, 2014) Baykent-Beyhan, Tuğçe
In Turkey, there is a highly competitive environment for new graduates to acquire a well-paid and satisfying job position since the number of unemployed university graduates has risen dramatically over the last few decades with the increasing number of universities in alignment with the growth of young population. In this paper, “Sectoral Practicum Projects”, one of the innovative approaches presented by higher education institutions in the pursuit of strengthening the link between universities and Industry and promoting “employability”, are explained. Comprehensive results of the surveys conducted to measure the impact of the approach and responded by the project partners including students, faculty supervisors, company supervisors and project coordinators are provided. In a quest to develop the professional skills of the undergraduates and create a real-life learning experience for students within the sector, Sectoral Practicum projects can be suggested as an effective method to set a university graduate apart from his/her peers.
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Curb space management in urban mobility system
(Springer Nature, 2019) Yu, M.; Bayram, A.; Cesaret, Bahriye; Business Administration; Fathi, M.; Khakifirooz, M.; Pardalos, P. M.; CESARET, Bahriye
Curb space management and traffic flow are two important elements of the transportation system that interact with each other and affect the overall system performance. Moreover, the growth of new mobility operators and goods delivery in urban result in a growing demand for pickup/drop off access to the curb sides. The curb space is now also a spot for pickup/drop off passengers and loading/unloading goods. Thus, the traditional use of curb space for parking only is challenged and it becomes important to manage the curb space effectively and determine the optimal capacity decisions for different uses. Our study investigates the allocation of curb space for various uses so that the overall transportation system performance can be enhanced. We simulate the transportation system and analyze the interactions between traffic flow and curb space usage. We propose optimal capacity allocation decisions that ensure a smooth traffic flow. We derive optimal curb space allocation policies that vary according to the customer demand during the day.
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Digital technology and the stages of digital business transformation
(IEEE, 2022) Mutlu, Irmak; den Hartigh, Erik; Üçler, Çağlar; Entrepreneurship; Professional Flight Program; HARTIGH, Erık Den; ÜÇLER, Çağlar; Mutlu, Irmak
Companies use digital technology to transform their business. Digitization, digitalization, and digital transformation have been proposed as stages in this business transformation process. Researchers have also proposed a variety of maturity models to assess this transformation. The distinctions and the ontology between the stages of digital transformation are not always clearly defined. Using expert interviews and literature review this paper derived a domain-specific ontology from commonly expressed keywords. Based on this, five stages of digital transformation were distinguished and defined: (i) digital passive, (ii) digitization, (iii) digitalization, (iv) digital transition and (v) digital transformation. These five stages may be used in further research as a rubric to assess digital business transformation.
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Dynamic price and lead time quotation strategies to match demand and supply in make-to-order manufacturing environments
(Springer, 2020) Gel, E. S.; Keskinocak, P.; Gözbaşı, Tuba Yılmaz; Entrepreneurship; GÖZBAŞI, Tuba
We summarize the literature on dynamic quotation strategies under which a seller provides price and/or lead time quotes to a potential buyer, who then either accepts or rejects the quote. The goal of quotation strategies is to better match supply and demand by influencing and possibly smoothing out the demand. We identify some common observations and findings in this domain, and suggest directions of future work.
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Economic models of sponsored content in wireless networks with uncertain demand
(IEEE, 2013) Andrews, M.; Özen, Ulaş; Reiman, M. I.; Wang, Q.; Management Information Systems; ÖZEN, Ulaş
The interaction of a content provider with end users on an infrastructure platform built and maintained by a service provider can be viewed as a two-sided market. Content sponsoring, i.e., charging the content provider instead of viewers for resources consumed in viewing the content, can benefit all parties involved. Without being charged directly or having it counted against their monthly data quotas, end users will view more content, allowing the content provider to generate more advertising revenue, extracted by the service provider to subsidize its investment and operation of the network infrastructure. However, realizing such gains requires a proper contractual relationship between the service provider and content provider. We consider the determination of this contract through a Stackelberg game. The service provider sets a pricing schedule for sponsoring and the content provider responds by deciding how much content to sponsor. We analyze the best strategies for the content provider and service provider in the event that the underlying demand for the content is uncertain. Two separate settings are defined. In the first, end users can be charged for non-sponsored views on a per-byte basis. In the second we extend the model to the more common case in which end users purchase data quotas on a periodic basis. Our main conclusion is that a coordinating contract can be designed that maximizes total system profit. Moreover, the additional profit due to sponsoring can be split between the content provider and service provider in an arbitrary manner.
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Economic models of sponsored content in wireless networks with uncertain demand
(Wiley, 2014-09-09) Andrews, M.; Özen, Ulaş; Reiman, M. I.; Wang, Q.; Management Information Systems; ÖZEN, Ulaş
This chapter evaluates an approach whereby the service provider can tap into an alternative source of revenue, originating from sales of advertisements or products and channelled by the content provider in the form of sponsorship of viewing. It presents a simple economic model in which service provider congestion costs, end user (EU) bandwidth costs, and the price that the content provider must pay for sponsoring content are all determined on a per-byte basis. A key feature of the model is that the content has uncertain demand. The chapter focuses on the relationship between the service provider and a single content provider. It also presents a numerical example to demonstrate how the optimization might work in practice. The chapter indicates how the results can be adapted for the case of EU quotas. In most current wireless data plans, the EUs pay a certain fee for a fixed quota of data.
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Entrepreneurial characteristics and internationalisation of new ventures: a study of cognitive factors
(Inderscience Publishers, 2021) Saiyed, Abrarali Mohammadusmanali; Entrepreneurship; SAIYED, Abraralı Mohammadusmanalı
Researchers (Acedo and Jones, 2007; Acedo and Florin, 2006b; Zahra et al., 2005) have argued that the impact of entrepreneur’s cognition in international new ventures (INV) has been an under-researched area though it has been studied in the field of entrepreneurship. This paper tries to study impact of various cognitive factors, attitude, tolerance for ambiguity, proactivity, intuition and international orientation, on speed of internationalisation in new ventures. Primary data was collected from 149 French and 98 Indian SMEs. The results showed decision makers’ attitude towards internationalisation affect firm’s early internationalisation, it was found positive in India while negative in France. Interestingly decision makers with high intuition were found first to focus on domestic markets and later enter into international markets. International orientation is very important for early internationalisation in new ventures in France. Copyright © 2021 Inderscience Enterprises Ltd.
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An expectancy model of green product consumption and green brand equity
(Springer, 2018) Arıkan, Ramazan Hamza; Jiang, C.; Arıkan, Ramazan Hamza
Drawing from the expectancy theory, this paper proposes a model of green product consumption and green brand equity. Consumers’ green product evaluation results in some expectations regarding their consumptions. These expectations are categorized in material and ethical outcomes and are ensued by the instrumentality effect. This effect is reflected in the possession rewards for material outcomes and in the moral rewards for ethical outcomes. Green product consumption and green brand equity is contingent on the weighted valence of the respective rewards. The paper is the first study to examine green product consumption and green brand equity from an expectancy theory perspective. © 2018, Academy of Marketing Science.
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An explainable credit scoring framework: A use case of addressing challenges in applied machine learning
(IEEE, 2022) Güntay, Levent; Bozan, E.; Tigrak, U.; Durdu, T.; Ozkahya, G. E.; International Finance; GÜNTAY, Levent
While Machine Learning (ML) classification algorithms can accurately classify a borrower's credit risk, the determinants of the credit score cannot be interpreted clearly by customers, decision makers and auditors. The lack of transparency of black-box credit scoring mechanisms reduces the trust in the banking system and has serious implications for the financing and growth of businesses. Recent regulations in the European Union and the United States require that credit decision mechanism should by explainable and transparent. We present a framework for developing an explainable credit scoring model. Our scientific novelty is to follow a simple and parsimonious Surrogate approach for credit scoring. This approach estimates an explainable white-box model that effectively fits to the in-sample forecasts of the most accurate 'black-box' model. We implement the Surrogate credit risk framework using check transactions data provided by a Turkish bank. We find that the Surrogate tree's performance is sufficiently close to performance of the most accurate black-box XGBoost model. Overall, our findings show that it is possible to develop a high-performing explainable credit scoring model with a minimal decrease in model accuracy.

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