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Citation - Scopus: 1
A Content Analysis of Sustainable Development in the Tourism Literature
(Taylor and Francis, 2019) Arzu Kalemci, R.; 42537
This study examines what fundamental issues are addressed in the tourism literature for defining sustainable development. By adopting a descriptive approach with a content analysis, 221 articles with the keywords “sustainable development” in their titles are analyzed in the current study. This study argues that although developmental and environmental dynamics is crucial, however, organizational dynamics of sustainable development should also be emphasized in the tourism literature. This study also shows that sustainability for companies operating in the tourism sector has a legitimating effect both at the organizational level and within the organization. © 2020 selection and editorial matter, Ipek Kalemci Tüzün, Mehmet Ergül and Colin Johnson; individual chapters, the contributors.
Citation - WoS: 1
Citation - Scopus: 2
A new causal discovery heuristic
(Springer, 2018) Prestwich, S. D.; Özkan, İbrahim; Tarim, S. A.; Ozkan, I.; 6641; 169580; Yönetim Bilişim Sistemleri
Probabilistic methods for causal discovery are based on the detection of patterns of correlation between variables. They are based on statistical theory and have revolutionised the study of causality. However, when correlation itself is unreliable, so are probabilistic methods: unusual data can lead to spurious causal links, while nonmonotonic functional relationships between variables can prevent the detection of causal links. We describe a new heuristic method for inferring causality between two continuous variables, based on randomness and unimodality tests and making few assumptions about the data. We evaluate the method against probabilistic and additive noise algorithms on real and artificial datasets, and show that it performs competitively.
A new classifier design with fuzzy functions
(Springer-Verlag Berlin, 2007) Celikyılmaz, Aslı; Türkşen, I. Burhan; Aktaş, Ramazan; Doğanay, M. Mete; Ceylan, N. Başak; 112010
This paper presents a new fuzzy classifier design, which constructs one classifier for each fuzzy partition of a given system. The new approach, namely Fuzzy Classifier Functions (FCF), is an adaptation of our generic design on Fuzzy Functions to classification problems. This approach couples any fuzzy clustering algorithm with any classification method, in a unique way. The presented model derives fuzzy functions (rules) from data to classify patterns into number of classes. Fuzzy c-means clustering is used to capture hidden fuzzy patterns and a linear or a non-linear classifier function is used to build one classifier model for each pattern identified. The performance of each classifier is enhanced by using corresponding membership values of the data vectors as additional input variables. FCF is proposed as an alternate representation and reasoning schema to fuzzy rule base classifiers. The proposed method is evaluated by the comparison of experiments with the standard classifier methods using cross validation on test patterns.
Citation - Scopus: 0
A New Clustering Method With Fuzzy Approach Based On Takagi-Sugeno Model in Queuing Systems
(IGI Global, 2013) Zanjanbar, F.G.; Şentarli, I.
In this paper, the authors propose a new hard clustering method to provide objective knowledge on field of fuzzy queuing system. In this method, locally linear controllers are extracted and translated into the first-order Takagi-Sugeno rule base fuzzy model. In this extraction process, the region of fuzzy subspaces of available inputs corresponding to different implications is used to obtain the clusters of outputs of the queuing system. Then, the multiple regression functions associated with these separate clusters are used to interpret the performance of queuing systems. An application of the method also is presented and the performance of the queuing system is discussed. Copyright © 2013, IGI Global.
Citation - Scopus: 5
A Research on Corporate Enterprise Resource Planning (ERP) Systems used for Supermarket Supply Chain Inventory Management in Turkey
(EuroJournals, Inc., 2009) Belbaǧ, S.; Tarım, Şule; Çimen, M.; Tarim, S.; Taş, A.; 29252; Çankaya Meslek Yüksekokulu
The purpose of this study is to draw a detailed picture of the current situation with regard to supply chain inventory planning systems used in the Turkish retail sector. During the study, companies developing enterprise resource planning (ERP) software were contacted and asked questions oriented to reveal the contribution of current enterprise resource planning software in supply chain management and the opportunities they offer to users in terms of inventory planning. Interviews were made using one or more of the interview techniques of electronic mail, telephone or one-to-one interview. Through these interviews, it was attempted to determine the estimation and planning capabilities of the existing ERP software and draw an inventory of the solutions currently offered to users that will meet the varying demands of the companies operating in the retail sector. In addition, a comparison of the ERP products of national and foreign software companies producing solutions with various functionalities for the retail sector is made along with an evaluation in view of enterprise management. © EuroJournals Publishing, Inc. 2009.
Citation - Scopus: 2
Advertising Ethics: A Field Study On Turkish Consumers
(2007) Ergin, E.A.; Ozdemir, H.; 120408
This study examines whether use of deception in ads, cultural stereotyping, sexual stereotyping, and emotional exploitation factors have an influence on the Turkish consumers. Specifically, the aim is to discover whether each of these four factors have any impact on the consumers ' recall of the ad and subsequent purchasing decisions. The results of this study should help foreign and domestic advertising agencies and their clients, already existing in or planning to enter the Turkish market, in understanding the Turkish consumers better.
An Empirical Investigatıon Of Turkish Consumers' Online Shopping Patterns
(2008) Ergin, Elif Akagün; Akbay, Handan Özdemir; 120408
With the rapid rise of Internet, the number of consumers shopping online for consumer goods and services has grown dramatically. This growth in Internet shopping in many different cultures around the world has attracted the attention of researchers interested in what leads individuals to adopt this mode of shopping. Similar to the global trend, Turkish consumers are increasingly opting to use the Internet for their shopping purposes as well. With a population over 70 million people, Turkish market’s potential for online commerce is quite significant. The aim of this study is to examine male and female consumers’ online shopping behavior, usage patterns and the key elements that encourage online shopping.
Citation - WoS: 3
Assessment of cluster potential and decision making criterion in the textile and apparel sector using the Analytic Hierarchy Process (AHP)
(Academic Journals, 2011) Aluftekin, Nilay; Tas, Aysegul; Yuksel, Oznur; Cakar, Gulsen Erenler; Bayraktar, Fatma; 29252; 7239
In this study, the potential of specific-sector clustering and the relevant decision-making criteria are identified for 10 provinces of Turkey based on the clustering approach and using the Analytic Hierarchy Process (AHP) and through one-to-one interviews and surveys administered on 2,327 firms active in the textile and apparel sector. When identifying this potential, the clustering tendencies of companies with input-output relations and included in the value chain were also used in addition to survey data. At the end of the study, according to the data obtained through the AHP and the surveys held in 10 provinces, two provinces came to fore, meeting the highest number of criteria in terms of clustering potential. These are the provinces of Istanbul and Gaziantep. The provinces of Izmir and Bursa were identified as being closer to having a clustering potential compared to other provinces. In addition, it is expected that this study will make a significant contribution to literature as this study uses the AHP method for the first time in identifying the potential of clustering.
Citation - WoS: 12
Complusive buying behavior tendencies: the case of Turkish consumers
(Academic Journals, 2010) Ergin, Elif Akaguen; 120408
Compulsive buying is a dysfunctional consumer behavior, a chronic failure to control the urge to purchase products and services. The two main goals of this study were to explore whether gender was a significant predictor of compulsive buying behavior and to determine the effect of two particular predispositional factors ( anxiety, depression) on compulsive buying. The primary data for this study was obtained from a questionnare that was administered in the capital city of Ankara. A convenience sample of three hundred and fourteen respondents participated in the study. Independent sample t - test, correlational and regression analyses were conducted for data analysis. The empirical findings showed that there are marked differences in compulsive buying tendencies of Turkish women and men, and factors such as age and anxiety are strongly related to compulsive buying behavior.
Consumers Purchase Intentions For Foreign Products: An Empirical Research Study In Istanbul, Turkey
(2010) Akagün Ergin, Elif
Consumers in developing countries seem to possess an increasing demand for the purchase of foreign products. Turkey is a magnet for multinational corporations that view the country as a must-win market. It has become important to determine the underlying intentions that drive the purchase decisions for foreign products in the Turkish market. The purpose of this study is to contribute to the literature by examining the purchase intentions of urban, Turkish consumers for foreign products in three specific categories (apparel, chocolate and personal care products). These categories were selected by taking their applicability to urban consumers into consideration. A field study was carried out at three major shopping malls in Istanbul, with the participation of 600 urban, Turkish consumers. Surveys, consisting of 3 parts and a total of 50 questions, have been used to gather data. In the first part, the subjects were asked about the factors that affect their purchasing motives. The top five factors were reported as perceived brand prestige, quality, value, purchase intention, and influence of others. In the second part, questions were asked regarding the subject’s reactions about foreign brands according to the determined categories. Finally in the third part, the participants were asked about their demographics and other personal factors. The empirical evidence provides insights into the significance of impact of product category, perceived brand prestige, perceived brand quality and influence of others. The results of the multi-linear regression analysis are reported along with significant implications for marketing managers
Consumers’ Attitudes towards Brand Extensions: An Analysis on Food and Textile Industries in Turkey
(2016) Şahin, Nilay; Ergin, Elif
Brand extensions refer to use an established brand name in new product or product categories and are extensively applied as a marketing strategy. Brand extension success factors vary according to cultures. Consumers’ attitude towards extensions is modified on the basis of their cognitional reactions and relations between the parent brand and extended product and/ or product categories. This study aims at conducting an exploratory research and revealing the relationship between the parent brand and the extended brand. More specifically, the impact of parent brand loyalty on the extension is explored. Therefore, the main objective is to evaluate the attitudes of consumers towards brand extensions through brand loyalty. The study analyzes consumers’ attitudes towards brand extensions specifically in food and textile industries. This is in particular to portray that consumers respond positively to brand extensions in various industries due to different motivations. During the methodology application process, in-depth interviews were carried out with 16 participants who were selected from employees working for public and private institutions in Ankara, the capital of Turkey. The interviews were conducted in two stages. During the first stage, the interviews lasted approximately 45 minutes and consisted of open-ended questions about participants’ brand choices, reasons for choosing the brands they use. The goal was to evaluate their brand loyalty levels. In addition, the participants were provided with the definition of brand extension and their reactions towards extension were noted. In the second stage, the participants were asked to evaluate their attitudes towards brand extensions in food and textile industries along with the factors that have impact on their evaluations. The participants were specifically observed in terms of their approach to brand extensions where the extension was in a totally different sector from the parent brand. The results indicate that brand awareness has a significant impact on brand extensions with regards to quality and trust. However, this impact is at the highest level when the extension is within the same sector with the parent brand. Whenever the extension is in a different sector, consumers not only have negative attitudes toward that extension but also become suspicious about the parent brand. Thus, quality and trust are pivotal factors influencing consumers’ positive attitudes towards brand extensions.
Corporate Governance, Board of Directors and Company Performance in Turkey
(2019) Şener, İrge; 21583; İşletme
Citation - WoS: 68
Citation - Scopus: 82
Detecting stock-price manipulation in an emerging market: The case of Turkey
(Pergamon-elsevier Science Ltd, 2009) Ogut, Hulisi; Doganay, M. Mete; Aktas, Ramazan; 112010; 1109
This paper aims to develop methods that are capable of detecting manipulation in the Istanbul Stock Exchange. We take the difference between manipulated stock's and index's average daily return, average daily change in trading volume and average daily volatility and used these statistics as explanatory variables. The data in post-manipulation and pre-manipulation periods are used as non-manipulated instances while the data in the manipulation period are used as manipulated instances. Test performance of classification accuracy, sensitivity and specificity statistics for Artificial Neural Networks (ANN) and Support Vector Machine (SVM) are compared with the results of discriminant analysis and logistics regression (logit). We found that the data mining techniques (ANN and SVM) are better suited to detect stock-price manipulation than multivariate statistical techniques (discriminant analysis, logistics regression) as the performances of the data mining techniques in terms of total classification accuracy and sensitivity statistics are better than those of multivariate techniques. We also found that unit change in difference between average daily return of manipulated stock and the index has the largest effect while unit change in difference between average daily change in trading volume of manipulated stock and index has the least effect on multivariate classifiers' decision functions. (C) 2009 Elsevier Ltd. All rights reserved.
Citation - WoS: 0
Discussing the Role of Trust in Behavioral Assumptions of Transaction Cost Theory
(Igiad-turkish Entrepreneurship & Business Ethics Assoc, 2013) Kalemci, Rabia Arzu; Kalemci, Rabia Arzu; 42537; İşletme
In its attempts to explain organizations based on their economical approach, transaction cost theory has a unique position among all organizational theories since it derives its assumptions from human behaviors. The basic behavioral assumptions of transaction cost theory are "opportunism" and "bounded rationality." Transaction cost theory includes a selection of governance mechanisms whose goal is to minimize transaction costs based on the aforementioned behavioral assumptions. This study discusses the notion that not only is "trust" one of the most important aspects of work ethics, but that it is also disregarded by the abovementioned governance mechanisms of transaction cost theory. This study also underlines the importance of building an environment of trust in an organization rather than selecting governance mechanisms under an "opportunist" and "bounded rational" paradigm, as is currently the case in transaction cost theory.
Citation - WoS: 8
Citation - Scopus: 6
Does ADR listing affect the dynamics of volatility in emerging markets?
(Charles Univ-prague, 2010) Umutlu, Mehmet; Umutlu, Mehmet; Altay-Salih, Aslihan; Akdeniz, Levent; 38254; 178057; İşletme
This paper analyzes the time-series variation in the return volatility of non-US stocks from emerging markets that are cross-listed on US exchanges. Unlike previous studies in the cross-listing literature, return volatility is modeled using conditional heteroscedaslicity models. We find that firms' exposure to risks such as local and global market betas remain unchanged after cross-listing. Moreover, we do not identify notable changes in the dynamics of the volatility of cross-listed stocks after cross-listing except for leverage effects. We further show that the mean level of conditional variance is not affected after cross-listing. Thus, our results provide counter-evidence to the belief that foreign investor participation drives volatility upward.
Citation - WoS: 4
Citation - Scopus: 5
Does workplace envy always have detrimental consequences in organizations? A study of public and private sector employees
(Emerald Group Publishing Ltd, 2022) Sener, Irge; Şener, İrge; Karabay, Melisa Erdilek; Elci, Meral; Erman, Halil; 21583; İşletme
Purpose Based on the situational approach for envy, the purpose of this paper is to examine the effect of two-dimensional workplace envy (being envied and envying others) on the task and contextual performance of employees working in either private or public sector organizations. Design/methodology/approach This study was conducted on survey data collected from 988 private sector employees and 530 employees from the public sector employed in Istanbul. Following a quantitative empirical design, structural equation modeling was used to test the hypotheses. Findings The study results revealed that envying-others dimension has a significant negative effect on both task performance and contextual performance. In addition, the findings indicate more envious feelings of private sector employees than public sector employees. For public sector employees, male participants were found to envy others more than females. Research limitations/implications In addition to the contributions, this study has its limitations. First, although the study was carried out with a comprehensive sample, it is limited to the views of 1,518 employees in Istanbul and is a cross-sectional study. Also, employee performance is evaluated through self-reporting, which forms another limitation; it could have been more reliable for the supervisors to assess their subordinates' performance. Practical implications Apart from scholars, our findings have implications for practitioners. Feelings such as envy that comes with a sense of competition can create an environment that stimulates people, motivates them to work, can make them productive and can also cause an ultimately destructive situation. This makes it critical to manage envy in the workplace. Though there may be facilitators behind it, one crucial factor that fuels envy in the workplace is the lack of fair human resources policies and systems. Still, human resources management is undeveloped in most public organizations. With effective human resources management, there may be some roadmaps for managers to dissolve conflicts arising from envy. First, it is imperative to have systems that will separate the employee from the others, which everyone will accept, strengthening the feelings of justice among employees. Envy often occurs following a social comparison. Management can implement an incentive system that supports employee collaboration and avoid nepotism. Especially in private organizations where the competition is more among employees, managers should give more attention to understand their subordinates' feelings. The managers' attention to expressing their feelings toward their subordinates could establish an equal distance within the workplace. In this sense, language selection is critical, and managers should be mindful of linguistic triggers. Managers should not avoid giving both positive and negative feedback to their employees. Unwarranted and unsystematic reward and/or punishment systems, made with the good intentions of increasing competition, can trigger envy. Finally, managers should implement an open-door policy and open communication that will encourage all team members to be transparent to each other. Originality/value The study was based on a rationale that envy has detrimental workplace outcomes that lead to low task and contextual performance. Although there exists a recent interest for examining the relation between workplace envy and employee performance, based on being envied and envying others dimensions, these studies are limited. This study focuses on these dimensions and performance relations, and it also provides a comparative outlook for public and private sector employees in Turkey in terms of workplace envy.
Citation - Scopus: 10
Effectiveness of SMEs in Turkish economy and agricultural industry sector
(2004) Baykal, N.A.; Gunes, E.
The latest developments and modulations in Turkish economy, adaptation process to European Union and entering into international markets, risks and uncertainties in these markets and some opportunities may affect SMEs in positive and negative aspects. In fact, new areas may open and some business sectors may slowly disappear. As part of the adaptation process with EU, SMEs deserve important order on the agenda while trying to enter international markets but are left to their fate in Turkey. In this article, the existing situations, problems and contributions of SMEs in industrial and agricultural sector to Turkish economy will be analysed, then policies that must be put in practice for more contribution to Turkish economy will be dwelt upon. Finally, solutions to these situations will be proposed. © 2004 Inderscience Enterprises Ltd.
Citation - WoS: 3
Citation - Scopus: 4
Entry Barriers to the Nanotechnology Industry In Turkey
(Igi Global, 2010) Aydogan-Duda, Neslihan; Şener, İrge; Sener, Irge; 21583; İşletme
Nanotechnology is the science that focuses on the control of matter at the atomic scale. It has the potential to create many new materials and devices with wide-ranging applications, such as in medicine, electronics and energy production. There are many entry barriers which can affect nanotechnology penetration in developing and emerging nations. This chapter discusses such barriers for Turkey. Despite about 10 universities having nanotechnology programs, the number of nanotechnology firms in the country is still low. Using combinations of interviews, surveys and literature, these issues that continue to stall the commercialization of discoveries in Turkey are examined.
Citation - WoS: 18
Citation - Scopus: 18
Estimation in bivariate nonnormal distributions with stochastic variance functions
(Elsevier Science Bv, 2008) Tiku, Moti L.; Islam, M. Qamarul; Sazak, Hakan S.
Data sets in numerous areas of application can be modelled by symmetric bivariate nonnormal distributions. Estimation of parameters in such situations is considered when the mean and variance of one variable is a linear and a positive function of the other variable. This is typically true of bivariate t distribution. The resulting estimators are found to be remarkably efficient. Hypothesis testing procedures are developed and shown to be robust and powerful. Real life examples are given. (C) 2007 Elsevier B.V. All rights reserved.
Citation - WoS: 5
Ethical Climate as a Mediator between Employees' Organizational Silence Behaviors and their Trust in Leader: An Empirical Research on Insurance Sector Employees
(Ardabil industrial Management inst, 2018) Karabay, Melisa E.; Şener, İrge; Sener, Irge; Tezergil, Seher A.; 21583; İşletme
Leaders play a major role in determining effectiveness across all organizational levels compromising (individual, team and units through their ability of ensuring trust among their subordinates and co-workers). In this study, the effect of trust in leader on employees' organizational silence behavior and ethical climate as a mediating role was investigated. In order to measure the impact of the perceptions of employees' trust in their leaders on their silence behavior particularly on defensive, acquiescent, and pro-social silence, a survey was conducted among 811 employees working in various insurance companies in Istanbul, Turkey. To test the hypotheses, hierarchical regression technique was used. According to the findings, trust in leader negatively affected silence intentions of employees. Furthermore, the findings presented a supporting evidence of the full mediating effect of ethical climate for the relation between trust in leader and overall organizational silence, and acquiescent and pro-social silence behavior. However, findings revealed that ethical climate had a partial mediating effect on the relation between trust in leader and defensive silence behavior of employees. (C) AIMI Journals

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