İşletme Bölümü Yayın Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/403

Browse

Now showing 1 - 20 of 80

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; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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: 3
Advertising Ethics: a Field Study on Turkish Consumers
(2007) Özdemir, Handan; Ergin, E.A.; Ozdemir, H.; 120408; Halkla İlişkiler ve Reklamcılık; 03.02. Halkla İlişkiler ve Reklamcılık; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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; 01. Çankaya Üniversitesi
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; 01. Çankaya Üniversitesi
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
Compulsive Buying Behavior Tendencies: the Case of Turkish Consumers
(Academic Journals, 2010) Ergin, Elif Akaguen; 120408; 01. Çankaya Üniversitesi
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; 01. Çankaya Üniversitesi
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; 01. Çankaya Üniversitesi
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.
Citation - Scopus: 1
A Content Analysis of Sustainable Development in the Tourism Literature
(Taylor and Francis, 2019) Arzu Kalemci, R.; 42537; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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.
Corporate Governance, Board of Directors and Company Performance in Turkey
(2019) Şener, İrge; 21583; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
Citation - Scopus: 2
Corporate Sustainability: the Use of Esg Scores in Finance Research
(IGI Global, 2023) Yilmaz, I.S.; Usul, N.; 01. Çankaya Üniversitesi; 08. Meslek Yüksekokulları; 08.02. Çankaya Meslek Yüksekokulu
This chapter presents an overview of sustainable finance literature focusing on studies using environmental, social and governance (ESG) practices, and conducts a descriptive and comparative analysis of the Refinitiv ESG database worldwide. With increasing interest in ESG investing, it is common to integrate ESG factors into portfolio decisions. The authors first address the relevant literature to .set the background for further studies. The chapter documents an increasing trend in ESG reporting and points out differences in ESG scores in terms of development level, region, industry, and legal origin for the period 2002-2019. Theoretical models and empirical tests, which integrate ESG factors into corporate performance, can only be established by a better understanding of ESG databases. Therefore, further research in the Refinitiv ESG database, as well as other ESG databases, is significant. This chapter contributes to this stream of research by explaining the Refinitiv ESG database with descriptive and comparative analysis, paving the way for new research on the subject. © 2023, IGI Global. All rights reserved.
Citation - WoS: 69
Citation - Scopus: 84
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; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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: 1
Citation - Scopus: 1
The Determination of Socio-Economic Factors Affecting Student Success by Data Mining Methods
(Ieee, 2013) Atalay, Veli; Ustun, Suleyman; Bulbul, Selin; 01. Çankaya Üniversitesi
The success of socio-economic level on students is a fact. The economic level and conditions combined with the student's potential make itself felt at the ultimate level. In this research, it was established that success and socio-economic factors which can attract the attention are effectively observed on particularly female students. It was ensured that a real and sound socio-economic criteria for success be determined by evaluating success and failure at terminal points. Decision trees and chi-square test were used in the implementation.
Discussing the Role of Trust in Behavioral Assumptions of Transaction Cost Theory
(Igiad-turkish Entrepreneurship & Business Ethics Assoc, 2013) Kalemci, Rabia Arzu; 42537; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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: 5
Citation - Scopus: 6
Does Workplace Envy Always Have Detrimental Consequences in Organizations? a Study of Public and Private Sector Employees
(Emerald Group Publishing Ltd, 2022) Karabay, Melisa Erdilek; Elci, Meral; Erman, Halil; Sener, Irge; 21583; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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.
The Effect of Knowledge Economy on Organizational Environments: Do the Governance Mechanisms Differ According To Institutional and Technical Environments
(int Business information Management Assoc-ibima, 2009) Sener, Irge; Şener, İrge; 21583; İşletme; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
Technological developments result in important changes for organizations and their environment. The most remarkable change in the organizational field is the widespread usage of Internet, a new information and communication technology (ICT). The changes depending on Internet, affect organizational structures, since they are designed compatible to the communication needs dependent on the technology. In some cases, however, the communication technologies can be developed in consistence with the organizational structure. This indicates that, when ICTs are taken into consideration, it occurs that there is no clear distinction between technical and institutional organizational environments. The ICTs dependent on Internet is both a legitimacy source for the organizations and an efficiency tool. Accordingly, in this study it is considered that the technical and institutional environments are interpenetrated and different types of governance mechanisms result due to the varying effects of the environmental pressures. Testable propositions are developed for different types of environments.
Citation - Scopus: 10
Effectiveness of Smes in Turkish Economy and Agricultural Industry Sector
(2004) Baykal, N.A.; Gunes, E.; 01. Çankaya Üniversitesi
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: 4
Citation - Scopus: 4
The Effects of Paternalistic Leadership on Task Performance: Testing a Moderated Mediation Model in Turkish Organizations
(Nomos verlagsgesellschaft Mbh & Co Kg, 2021) Karabay, Melisa Erdilek; Sener, Irge; Elci, Meral; Cetin, Fatih; 21583; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
Drawing on the findings from a serial moderated mediation model, this study aims to expand prior research by investigating the interaction between paternalist leadership and employee task performance. Study also aims to test the indirect effects of perceived person-organization fit and psychological ownership on the relationship between paternalistic leadership and employee task performance, through serial mediation models. Furthermore, the moderating role of organizational size in direct and all indirect relations between paternalistic leadership and task performance, through five different models is tested. Sample consists of 1,652 employees from various industries in Istanbul, Turkey. Hypothesized relationships were tested through structural equation modelling. The findings demonstrated the significant positive direct relationship between paternalistic leadership and employee task performance. Psychological ownership mediated the relationship of paternalistic leadership and task performance while person-organization fit had no mediating effect. Practical implications and further recommendations are also discussed.
Citation - WoS: 3
Citation - Scopus: 4
Entry Barriers To the Nanotechnology Industry in Turkey
(Igi Global, 2010) Sener, Irge; Aydogan-Duda, Neslihan; 21583; 03.04. İşletme; 03. İktisadi ve İdari Birimler Fakültesi; 01. Çankaya Üniversitesi
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.; 01. Çankaya Üniversitesi
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.

Browse

Browsing İşletme Bölümü Yayın Koleksiyonu by Access Right "info:eu-repo/semantics/closedAccess"