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  • Yayın
    Stock market response to natural disasters: Does corporate sustainability performance make difference?
    (Elsevier, 2024) Aksoy, Mine; Yılmaz, Mustafa Kemal; Tatoğlu, Ekrem
    This study aims to examine the short-term price reactions of the stocks listed on Borsa Istanbul (BIST) after the severe earthquake of February 6, 2023, that happened in the southeastern region of Türkiye covering 11 provinces and causing more than 50,000 fatalities. Using a sample of 450 companies listed on the BIST All Index, this study estimates the abnormal returns (ARs) of stocks by employing an event study methodology. Using BIST 100 companies as a sub-sample, this study also explores whether sustainability performance creates resilience against downside risk after the earthquake. The results of the market model and the mean-adjusted model show that on the event day, most of the sectors had negative and significant ARs, while only the non-metal mineral products had positive and significant ARs. Most of the sectors continued to decline in the following 10 days except basic metal and non-metal mineral products sectors. The telecommunications sector was the most negatively affected sector in both models after the event day as it has underperformed in ensuring uninterrupted access to communication. The findings also indicate that firms in the financial sector that have higher sustainability performance are more resilient in responding to the disaster.
  • Yayın
    Strategic agility and product development in emerging markets: The role of employee resilience and self-efficacy as microfoundations
    (IEEE, 2024) Bouguerra, Abderaouf; Gölgeci, İsmail; Gligor, David M.; Khan, Zaheer; Arslan, Ahmad; Tatoğlu, Ekrem; Tatoğlu, Ekrem
    While strategic agility is increasingly acknowledged as a critical source of innovation and product development performance (PDP), little attention has been paid to the microindividual capabilities that translate strategic agility into greater PDP. In this article, we examine the mediating roles of employee resilience and self-efficacy as key dynamic microlevel (individual) capabilities that connect firms' strategic agility to their PDP in the emerging market of Türkiye. We draw on dynamic capabilities theory, adopt a microfoundations approach, and run a multilevel analysis using data from 758 managers working in 185 firms to test our hypotheses. We draw on the microfoundations of PDP and provide important insights into how individual capabilities enable attaining higher PDP in emerging markets. In particular, the findings suggest that strategic agility is positively associated with PDP. Also, the impact of strategic agility on PDP - both examined at the organizational level - is conveyed through individual-level capabilities of employee resilience and self-efficacy. Our study makes significant theoretical contributions to innovation and product development, operations management, and strategic agility research and draws managerial implications.
  • Yayın
    Exploring sustainability trends in fashion industry: The experts’ insights of fashion producers in Türkiye
    (Turkish Academy of Sciences Publication, 2023) Shehneh, Mohannad; Kachkar, Omar
    This study investigates the latest trends and practices in sustainable fashion in Türkiye. Focusing on the top three fast fashion brands in the country, the study aims at examining how these brands conceptualize and apply sustainable fashion as well as the motivation, prospects and challenges involved in the process. Given the exploratory nature of the study qualitative approach is employed. Data was collected mainly from interviews with sustainability directors in the brands along with industry experts. Latent thematic analysis is utilised for data analysis. Our results show that sustainable fashion is still in its inception stage in the country with top brands still struggling to follow well-defined efficient sustainability concepts, leadership and strategies. In spite of the challanges faced by fashion industry players, promising prospects were highlighted given the increasing awareness and attitudes of young generation. Findings highlight the potential of stakeholder approach, consumer-focused approach, awareness-raising and government support in dealing with various challenges facing sustainable fashion in the country. The study provides useful insights on how to bring about a change not only in the fashion industry but in the society at large by raising awareness of the importance of sustainable lifestyles.
  • Yayın
    Assessment of technical and financial challenges for renewable energy project alternatives
    (Elsevier, 2024) Eti, Serkan; Yüksel, Serhat; Dinçer, Hasan; Kalkavan, Hakan; Hacıoğlu, Ümit; Mikhaylov, Alexey; Shah Danish, Mir Sayed; Pinter, Gabor; Hacıoğlu, Ümit
    The purpose of this study is to assess technical and financial challenges for renewable energy project alternatives with a novel model. Firstly, a set of technical and financial challenges is created by considering the results of the literature evaluation. After that, the weights of these values are computed by Sine Trigonometric Pythagorean Fuzzy (ST-PFN) DEMATEL. The next step includes the ranking of six renewable energy alternatives with interval valued Spherical fuzzy multicriteria analysis with ratio and categorical data (SF MAIRCA) approach. Entropy and ARAS methodology are also considered to make comparative evaluation. Similarly, sensitivity analysis is also conducted for 10 different cases. It is concluded that the analysis results of all methods are the same. Therefore, it is identified that the findings of the proposed model are reliable and coherent. Identification of the most crucial technical and financial challenges of the renewable energy projects is the most important contribution of this manuscript. Furthermore, preferring the sine trigonometric structure in the proposed model will provide superiority to this model in many respects. It is concluded that difficulty in accessing finance for local projects is the most significant challenge for renewable energy investments. Moreover, competitive pricing of renewable sources is another critical issue in this regard. Additionally, it is identified that solar is the most successful renewable energy alternative to overcome technical and financial challenges.
  • Yayın
    Efficiency analysis of major airlines: Exploring the operational performance determinants in aviation
    (Springer, 2024) Yalçın, Kübra Çınar; Kuşakcı, Ali Osman; Tatoğlu, Ekrem; Kuşakcı, Ali Osman; Tatoğlu, Ekrem
    This paper evaluates the performances and dynamics of productivity changes of 38 airlines from different regions of the world between 2015 and 2019, assessing the effects of business model, alliance membership, the economic development level of the home country, and size on the operational performance of the airlines. In this regard, first, constant returns to scale (CRS) and variable returns to scale (VRS) input-oriented data envelopment analysis (DEA) models with three inputs and two outputs are implemented. The input-oriented CRS model super-efficiency DEA is also used to discriminate between efficient airlines. The Malmquist Productivity Index (MPI) estimates efficiency dynamics across time. Further, the determinants of operational efficiencies are assessed by applying Mann-Whitney rank-sum tests. The analysis results show that most airlines suffer from scale inefficiency. MPI signifies productivity deterioration in airlines’ performance. It is found that low-cost carriers (LCC) have performed better than full-service carriers and alliance member airlines are less efficient than non-member airlines. Additionally, developed country airlines show better performance than their emerging country counterparts. Lastly, the size of airlines measured in available seat kilometers (ASK) is found to have no statistically significant effect on performance.
  • Yayın
    Adapting social media strategies: a comparative analysis of Turkish Airlines, Qatar Airways, and Emirates before, during, and after the COVID-19 Pandemic
    (Bussecon International Academy, 2023) Kim, Tatyana; Kuşakcı, Ali Osman; Kuşakcı, Ali Osman
    In recent years, the aviation industry has transformed significantly, driven by the increasing importance of digital technologies and social media for communication and marketing. The COVID- 19 pandemic accelerated this transformation, posing unprecedented challenges to airlines. The present study investigates how Turkish Airlines, Qatar Airways, and Emirates adapted their social media strategies before, during, and after the pandemic. The research has a threefold focus: (i) assessing pre- pandemic social media strategies, (ii) examining strategy evolution during the pandemic, and (iii) comparing the effectiveness of these strategies before and after COVID-19. By exploring how these airlines leveraged social media to navigate pandemic-related disruptions and maintain vital connections with passengers, this study provides valuable insights. These findings hold significant implications for aviation stakeholders, marketing professionals, and researchers, shedding light on the evolving role of social media in crisis communication and marketing. The study uncovered interesting changes in how airlines use Twitter. After the pandemic, they started using more emojis, and their messages shifted from promoting services to expressing hope during the pandemic and back to promotions afterward. They played with visuals and hashtags. Pricing-wise, they offered discounts for students, different ticket options, and bundled services. In promotions, they focused on being environmentally and socially responsible, user convenience, and specific events. They mainly shared updates on flights, achievements, and travel advice. To engage people, they used quizzes, replied directly to customers, and targeted specific groups. For marketing managers, the study suggests being more customer-focused, emphasizing environmental and social responsibility, offering diverse pricing, celebrating milestones, and creating engaging content. Overall, the findings provide practical insights for adjusting marketing strategies in the ever-changing world of airlines, especially considering the challenges brought by COVID-19.
  • Yayın
    Optimizing passenger experience: A technological preference analysis in Turkish Airports
    (Bussecon International Academy, 2023) Humza, Muhammad; Hacıoğlu, Ümit; Hacıoğlu, Ümit
    Aviation-oriented companies are continuously seeking innovative approaches to enhance the passenger experience and operational efficiency within the industry. The objective of this study is to evaluate the categorization of passengers' technological preferences in Turkish airports. The objectives of this study are to enhance the understanding of Aviation Companies in Turkey regarding the technology preferences of passengers and their fundamental needs, as well as to analyze the characteristics of passengers that are directly linked to their technological choices. This study employs purposive sampling with a sample size of 455. Various statistical techniques, such as regression, correlation, and descriptive statistics, are employed to analyze the data. The findings indicate that biometric technology, personal device utilization, customisation and customization, as well as streaming and on-demand entertainment, greatly influence the technological preferences of travelers. Nevertheless, contactless solutions, inflight Wi-Fi, and mobile apps and digital services do not influence the technological preferences of travelers.
  • Yayın
    Unveiling the drivers of global logistics efficiency: Insights from cross-country analysis
    (MDPI, 2024) Bayraktar, Erkan; Eryarsoy, Enes; Kosanoglu, Fuat; Acar, Mehmet Fatih; Zaim, Selim; Zaim, Selim
    This study presents a novel approach to assess countries’ relative logistics performance differentials and identifies the underlying drivers using a data envelopment analysis (DEA) approach. The findings offer strategic insights and provide nations with valuable guidance in navigating the dynamic landscape of global logistics competitiveness. Recognizing the pivotal role of logistics in fostering economic activity and contributing to sustainability, we utilize the Logistics Performance Index (LPI) within the DEA model to gauge efficiencies at the country level and scrutinize influencing factors. Our findings indicate that international shipment practices in the last decade, as well as tracking and tracing recently, no longer contribute to the competitiveness of the countries, despite their potential for improvement. The overall change in logistics efficiency during the last decade remained relatively marginal, primarily driven by the frontier-shift effect. However, notable disparities among the country performance groups, particularly in adopting technological advancements, are manifested in the frontier-shift effect. Countries with lower logistics performance should prioritize addressing structural challenges related to customs, infrastructure, quality of logistics services, and timeliness. Medium-performance countries, while benefiting from a focus on customs, tracking and tracing, and timeliness in the early 2010s, are advised to align their efforts with high-performance countries by emphasizing managerial aspects in recent times.
  • Yayın
    Unmasking deception: Exposing the predatory practices of the "Global International Journal of Innovative Research”
    (Bussecon International Academy, 2023) Hacıoğlu, Ümit; Hacıoğlu, Ümit
    In the pursuit of academic excellence, scholars are dependent on trustworthy journals to disseminate their research and contribute to the collective body of knowledge. However, the academic community is not immune to deceptive practices. This letter highlights the case of the "Global International Journal of Innovative Research," where my name, along with esteemed colleagues, was falsely associated with the editorial board without consent. Despite repeated efforts to address this issue, the journal remains unresponsive. This letter announces our intention to publish an exposé article, meticulously uncovering the fraudulent practices of the journal and its publisher. A subsequent public statement aims to warn the academic community about the deceptive nature of the "Global International Journal of Innovative Research" and emphasizes the collective responsibility of scholars to uphold ethical publishing standards. Through this exposé, we hope to safeguard the integrity of academic pursuit and raise awareness about the risks associated with engaging with predatory journals.
  • Yayın
    Revealing deceptive tactics: Uncovering predatory practices within the "Global International Journal of Innovative Research"
    (SSBFNET- Center for Strategic Studies in Business and Finance, 2023) Hacıoğlu, Ümit; Hacıoğlu, Ümit
    In the pursuit of academic excellence, scholars are dependent on trustworthy journals to disseminate their research and contribute to the collective body of knowledge. However, the academic community is not immune to deceptive practices. This letter highlights the case of the "Global International Journal of Innovative Research," where my name, along with esteemed colleagues, was falsely associated with the editorial board without consent. Despite repeated efforts to address this issue, the journal remains unresponsive. This letter announces our intention to publish an exposé article, meticulously uncovering the fraudulent practices of the journal and its publisher. A subsequent public statement aims to warn the academic community about the deceptive nature of the "Global International Journal of Innovative Research" and emphasizes the collective responsibility of scholars to uphold ethical publishing standards. Through this exposé, we hope to safeguard the integrity of academic pursuit and raise awareness about the risks associated with engaging with predatory journals.
  • Yayın
    The role of quality in airport services in passenger satisfaction at Aden Adde International Airport, Mogadishu, Somalia
    (Bussecon International Academy, 2024) Farah, Nuh Abdulle; Hacıoğlu, Ümit; Hacıoğlu, Ümit
    Service quality is crucial for all service providers operating in the open market across all industries, particularly in the aviation sector, which produces billions of dollars in annual revenue from its services. The level of service quality significantly influences client satisfaction, and conversely, customer happiness reciprocally affects the service provider. In order to attain diverse company objectives, it is imperative to prioritize customer happiness specifically during the process of privatization. The primary objective of this research is to examine the influence of airport service quality on customer satisfaction within the context of a privatized airport. Descriptive and correlation analysis were utilized in the study. A total of 400 questionnaires were administered to passengers who embarked from Aden Adde International Airport as part of the study. Subsequently, the data was subjected to analysis utilizing a statistical software program designed for social science software (SPSS). The results of this analysis revealed a robust and positive correlation between Airport customer services and customer happiness. The study additionally revealed that a significant proportion of the airport's passengers expressed dissatisfaction with the services provided by Aden Adde International airport.
  • Yayın
    Ahiliğin tarihi kökenleri ve çağdaş iş dünyasına ahlaki çözüm üretme kapasitesi
    (OSTİM Teknik Üniversitesi Yayınları, 2023) Arslan, Mahmut; Arslan, Mahmut
    Bu bölümde Ahiliğin bir sentez medeniyeti olan Türk-İslâm medeniyetinin asli unsurlarından biri olduğundan ve de Türk çalışma ahlâkının biricik referansı olduğundan hareketle bu geleneğin kökeni ve günümüz sorunlarına cevap potansiyeli tartışılacaktır. Bu bölüm kaleme alındığı sıralarda ülkemiz 6 Şubat 2023 tarihinde Kahramanmaraş, Pazarcık merkezli eşi görülmemiş bir deprem felaketi ile karşılaştı ve on binlerce insan öldü, yüz binlerce insan yaralandı ve sakat kaldı. Tıpkı 1999 Gölcük depremi gibi bu depremde de kayıpların tek nedeni ülkemizde binaları inşa eden iş dünyasının ve onları denetleyen kamu otoritelerinin kadim Ahilik değerlerinden çok uzakta olmalarıdır. Deprem felaketinin nedeni teknik değil ahlakidir. Bu nedenle Ahilik çok daha fazla üzerinde durulması gereken kadim bir kurumdur. Bu bölümde Ahiliğin zannedildiğinden çok daha köklü ve kadim bir gelenek olduğunu tarihi örneklerle göstermeye çalışacağız…
  • Yayın
    Untangling the influence of corporate sustainability on export intensity: The moderating role of R&D intensity
    (SAGE Publications, 2024) Aksoy, Mine; Yılmaz, Mustafa Kemal; Gölgeci, İsmail; Tatoğlu, Ekrem; Cancı, Metin; Hızarcı, Atike Elanur; Yılmaz, Mustafa Kemal; Tatoğlu, Ekrem
    Growing global environmental and social issues have imposed increased pressure on firms to address sustainability challenges in international markets, with a particular focus on improving their export performance. This is of significant importance for emerging market firms aiming to expand their presence in international markets, as they are compelled to bolster their environmental and social sustainability capacity to enhance their export intensity. This study delves into the relationship between corporate sustainability and export intensity through a longitudinal examination of 141 firms listed on Borsa Istanbul from 2014 to 2021. The results suggest that corporate sustainability positively influences export intensity, and this influence is further positively moderated by research and development (R&D) intensity. Additionally, post hoc analysis employing supplementary data pertaining to the environmental, social, and governance dimensions of corporate sustainability reveals that environmental performance plays a positive role in shaping export intensity, with R&D intensity positively moderating this relationship. In summary, the findings underscore that exporting firms that effectively integrate impactful R&D intensity into their international business operations are likely to harness their sustainability strategies, particularly those related to the natural environment, to achieve higher export intensity.
  • Yayın
    Howdo organizational career management activities influence employees’ career outcomes? The mediating role of career capital
    (Emerald Group Publishing, 2023) Yıldız, Didem; Bozbura, F. Tunç; Tatoğlu, Ekrem; Zaim, Selim; Tatoğlu, Ekrem; Zaim, Selim
    Purpose – This study addresses a critical research gap by examining the pivotal role of organizational career management (OCM) in shaping employees’ career outcomes while also investigating the mediating influence of career capital in this relationship. This study aims to shed light on the importance of OCM as a strategic approach for enhancing employees’ career trajectories, filling a significant gap in the existing literature. Design/methodology/approach – Using a cross-sectional research design, primary data were gathered through a structured questionnaire administered to a diverse sample of 426 Turkish working adults representing various organizations. The study uses structural equation modelling with AMOS to analyse the direct and indirect relationships within the proposed research model. Findings – The study findings underscore the essential connection between OCM and employees’ career outcomes, revealing its positive influence on subjective career success, employability and innovative work behaviour. Moreover, career capital emerges as a critical intermediary mechanism that mediates the impact of OCM on these career outcomes, further highlighting the strategic significance of OCM practices. Research limitations/implications – It is important to note that this study relies on self-report surveys to gauge employees’ perceptions about their career outcomes and OCM. Additionally, the study data are confined to the Turkish context, which may influence the generalizability of the findings to other contexts. Practical implications – Organizations can bolster career outcomes through strategic investment in OCM. Industries can customize approaches, leveraging insights to optimize workforce potential. Policymakers should integrate career development principles, cultivating a culture of perpetual learning, thus fortifying organizational resilience and fostering sustainable success. Originality/value – This study adds substantial value to the current body of knowledge by investigating the mediating role of career capital in the relationship between OCM and individual career outcomes, particularly within the context of emerging economies like Turkey. The study’s comprehensive approach to understanding careers from both individual and organizational perspectives contributes to a more nuanced and holistic understanding of career dynamics.
  • Yayın
    Multidimensional analysis of investment priorities for circular economy with Quantum Spherical Fuzzy Hybrid Modeling
    (World Scientific Publishing, 2024) Dinçer, Hasan; Yüksel, Serhat; Hacıoğlu, Ümit; Erdebilli, Babek; Hacıoğlu, Ümit
    Circular economy aims recycling in the production process instead of destroying the products. With the help of this situation, waste can be considered in the remanufacturing process so that the rate of consumption of natural resources can be decreased. It is necessary to focus on certain investment issues to achieve a circular economy, but all investments have some risks. Hence, the economies should make priority analysis to take efficient actions. Investment priorities are identified to have circular economy. A novel fuzzy decision-making model has been created for this purpose. In the first stage, balanced scorecard criteria are evaluated with the help of multi stepwise weight assessment ratio analysis (M-SWARA). Later, the multidimensional investment priorities of circular economy are ranked. In this context, elimination and choice translating reality (ELECTRE) approach is taken into consideration. The main contribution of the paper is that a new methodology is created by the name of M-SWARA. Owing to these new improvements, cause and effect relationship among the items can be analyzed. It is identified that financial issues play the most crucial role for investments to improve circular economy. On the other side, it is also concluded that remanufacturing is the most significant investment alternative to develop circular economy. For the sustainability of the investment to improve circular economy, necessary financial analysis should be performed. With the help of this situation, these substances can be reintroduced into the production process in the form of raw materials. With the increase of remanufacturing, it will be possible to reduce waste and save scarce material resources.
  • Yayın
    Decoding technological frames: A qualitative inquiry into business analytics perspectives
    (Taylor and Francis, 2024) Keskin, Halit; Akgün, Ali Ekber; Tatoğlu, Ekrem; Etlioğlu Başaran, Hatice Tuba; Tatoğlu, Ekrem
    Technological frames, examined through the lenses of social construction of technology (SCOT) and social cognition, are pivotal in organisational research. This study presents a comprehensive literature review from SCOT and social cognition perspectives, offering nuanced insights into how individuals perceive and interpret technology. Employing an exploratory qualitative approach, we conducted semi-structured interviews with professionals from diverse industries, chosen for their varied expertise. Through content analysis, we identified eight technological frame domains: affective and cognitive dimensions, application value, personal attitude, job-related factors, managerial and organisational influence, and colleagues’ impact. Our inquiry delves into the intricate factors shaping these frames, highlighting influences at both individual and organisational levels. Crucially, this study underscores the relevance of its findings for business analytics and technology management, illuminating cognitive and affective dimensions that significantly impact technology adoption and organisational outcomes.
  • Yayın
    Geleneksel basından dijitale geçiş sürecinde gazetecilik etik ilkelerinin değişim ve dönüşümü: New York Times örneği
    (İbn Haldun Üniversitesi, 2024) Arslan, Mahmut; Eren, Selçuk; Arslan, Mahmut
    Bu makalenin amacı gazetecilik meslek etiğinin güven üzerine etkisini New York Times gazetesi üzerinden açıklamaya çalışmaktır. Nitel araştırma yöntemiyle oluşturulan araştırmada örnek olay çalışması olarak New York Times incelenmiştir. Veri toplama aracı olarak yarı yapılandırılmış görüşme metodu benimsenmiş ve her biri farklı ülkeden olan 19 gazeteci ile uzaktan bire bir görüşmeler gerçekleştirilmiştir. Görüşmeler, betimsel ve içerik analizi yöntemine göre ele alınmıştır. Araştırma kapsamında: Haber sitelerinin gelir modellerine daha fazla odaklandığı, kamuoyunda güven konusundaki farkındalığın yükseldiği, gazetecilerin etik sorunlara karşı bilincinin arttığı ve haber merkezlerinin dijitalleşmeye yönelik dönüştürülmeye başlandığı saptanmıştır. Bu faktörlerden dolayı internet haberciliğinin geleceğinin son 10 yılda olduğu kadar problematik geçmemesi beklenmektedir. Katılımcıların “tarafsız yayıncılıktan” çok “güvenilir içeriğin” önemine vurgu yaptıkları belirlenmiştir. New York Times’ın internet ile geleneksel yayıncılığı başarılı şekilde koordine ettiği, internet ortamında okuyucuya ulaşmak için tüm araçları etkin şekilde kullandığı ve aldatıcı başlıklara başvurmadığı sonucuna varılmıştır. Bu araştırmanın geleneksel basından dijitale geçiş sürecinde yaşanan etik sorunlara karşı izlenebilecek yolların bulunmasına katkı sağlaması da hedeflenmektedir.
  • Yayın
    A comparative analysis on regulations and treatment of shariah non-compliance risk for Islamic banks in Malaysia and Turkey
    (2023) Azrak, Tawfik; Kachkar, Omar; Alfares, Marwa; Kachkar, Omar; Yönetim Bilimleri Fakültesi, İşletme Bölümü
    Islamic banks and conventional banks operate in different ways, thus, Islamic banks have different risk portfolios. Islamic banks are exposed to a unique kind of operational risk that is Sharia non-compliance risk (SNCR). The aim of this study is to examine the existing regulations and practices on SNCR in Turkey and Malaysia. The regulatory framework and guidelines in both countries have been critically analysed. This study has found that BNM has developed various advanced measures and procedures to manage SNC risk. the Central bank of Malaysia (BNM) has its own Sharia governance framework to effectively treat any SNC events. The Framework includes clear guidelines on SNCR management including control function, shariah risk management function, shariah review and sharia audit. This framework has played a key role in strengthening public confidence in the integrity, management and business operations of Islamic financial institutions including Islamic banks (IBs). On the other hand, the local standards of participation banks in Turkey are still in the process of formation. Up until now participation banks still operate under Turkish banking law which regulates Islamic banks as well as conventional banks with the same legislation. Thus, many experts believe that the sections which regulate the participation banks were not written in accordance with proper sharia guidance and its incompatible with shariah. Consequently, the absence and lack of proper sharia governance lead to misconceptions and complaints about the Islamic banking operations and occasionally faulty practices.
  • Yayın
    The effect of the COVID-19 pandemic on the performance of Turkish banks: A comparative panel data analysis
    (Inderscience Publishers, 2024) Kachkar, Omar; Bwando, William; Kachkar, Omar
    This study investigates the impact of the COVID-19 pandemic on the performance of conventional and participation banks in Turkey. Panel data with random effects was the main analysis methodology adopted by the study. The data of ten banks was analysed within the range of 2015–2021. The results of the combined analyses could not establish any impact of the pandemic on the profitability of both groups of banks. The same result is also observed when the analysis is conducted on both groups separately. In contrast, a negative impact on the operational efficiency of banks was observed when the analysis was conducted on the two sets of the banks combined. Interestingly, the results suggest that the pandemic had a negative impact on the operational efficiency of participation banks but not on conventional banks when the analysis was conducted on the two sets of the banks separately.
  • Yayın
    An evaluation of E7 countries’ sustainable energy investments: A decision-making approach with spherical fuzzy sets
    (De Gruyter, 2023) Rahadian, Dadan; Firli, Anisah; Dinçer, Hasan; Yüksel, Serhat; Hacıoğlu, Ümit; Gherghina, Ştefan Cristian; Aksoy, Tamer; Hacıoğlu, Ümit; Aksoy, Tamer; Yönetim Bilimleri Fakültesi, İşletme Bölümü
    The purpose of this study is to identify important strategies to increase sustainable energy investments in emerging economies. For this situation, first, four different indicators are selected according to the dimensions of the balanced scorecard technique. The weights of these items are computed by using Quantum Spherical fuzzy DEMATEL. In the second phase, emerging seven (E7) countries are ranked regarding the performance of sustainable energy investments. In this process, Quantum Spherical fuzzy TOPSIS is taken into consideration. The main contribution of this study is that prior factors can be defined for emerging economies to increase sustainable energy investments in a more effective way. Furthermore, a novel decision-making model is developed while integrating TOPSIS and DEMATEL with Quantum theory, Spherical fuzzy sets, facial expressions of the experts, and collaborative filtering. It is concluded that competition is the most significant factor for the performance of sustainable energy investments. In addition, the ranking results denote that China and Russia are the most successful emerging economies with respect to sustainable energy investments. It is strongly recommended that emerging countries should mainly consider benchmarking the capacity of energy hubs with the aim of increasing the capacity of ongoing energy plants.