Yücel, Ilhami; Bayat, Fikret

Purpose: This study aims to examine the relationship between occupational stress and employee performance of ARFF (Airport Rescue and Firefighting) officers working at airports in the transportation sector, with a particular focus on the role of co-worker support in this relationship. Methodology: The research was evaluated in detail using statistical analysis tools such as SPSS, AMOS and Process Hayes, based on data collected from surveys completed by 415 ARFF officers. Results: The findings revealed a negative relationship between occupational stress and employee performance, while a positive relationship was identified between co-worker support and employee performance. Furthermore, co-worker support was found to play a partial mediating role in the effect of occupational stress on employee performance, i.e., co-worker support helps to reduce the impact of stress on employee performance. These findings indicate that reducing occupational stress levels and increasing co-worker support among ARFF officers can have a positive impact on employee performance. Conclusion: The research results emphasize the importance of co-worker support in improving job performance of employees in public institutions operating in the transportation sector. In addition, the study discusses academic and practical implications and offers suggestions for future research.

Koçak, Daimi; Bas, Murat

Purpose: In this research, drawing on social exchange theory, we presented and evaluated a moderated mediation model, investigating trust in supervisor (TIS) as a mediator and psychological contract breach (PCB) as a moderator in the correlation between abusive supervision and individual creativity. Methodology: Data were collected from 275 employees employed in 11 private banks located in a city in Eastern Turkey. Results: The results revealed that TIS mediated the correlation between abusive supervision and individual creativity. Moreover, analyses of moderated mediation demonstrated that PCB moderated the indirect correlation between abusive supervision and individual creativity via TIS. Conclusion: This study enhances the abusive supervision literature by incorporating research on TIS and PCB.

Bas, Murat; Ayaz, Moh. Qasim; Agin, Kaya

Purpose: The purpose of this study is to explain the mediating effect of knowledge sharing (KS) between leader-member exchange (LMX) and work integration (WI) on healthcare workers. The study also examines the direct effects of LMX on WI among selected healthcare workers in T & uuml;rkiye. Methodology: The study targeted a sample of N = 295 to provide relevant information. The data were coland WI (Schaufeli et al., 2002). A purposive stratified sampling method was used since the participants were considered based on predefined criteria. The study used a 5-point Likert scale ranging from 1= strongly disagree to 5= strongly agree. SPSS 22.0 and AMOS 17.0 packages were used for data analysis and interpretation of statistical outputs. Results: The study revealed a significant positive relationship between variables. Goodness of fit values of the scales were also checked. First, the mediating variable (knowledge sharing) between LMX and WI was investigated. Second, the effect of LMX on WI was explored. Based on the findings, a significant positive Conclusion: According to the research results, significant relationships were found between LMX and WI, between LMX and KS, and between KS and WI. In addition, it was determined that knowledge sharing had a mediating role in the effect of LMX on WI, which was the main purpose of the research. According to the research results, high-quality LMX relationships enable employees to be more open to KS and to integrate more into their work. In this case, KS acts as a bridge that strengthens the link between LMX and WI. Employees find greater meaning in their work by sharing their knowledge, which in turn increases their commitment to it. As a result, leaders creating a culture that supports knowledge sharing can be seen as an effective way to increase work integration and improve organizational performance.

Ilgin, Kuebra Saka

Purpose: It can be stated that in today's competitive conditions, where portfolio management is very important, it has become necessary to examine the relationship between global financial assets and major cryptocurrencies, such as Bitcoin and Ethereum. This paper aims to investigate the cointegration and causality relationships between Bitcoin, Ethereum, and global financial assets such as gold, oil, the S&P Global 100, the Dow Jones Commodity, and the US Dollar Indices, and to determine the diversification role of Bitcoin and Ethereum comparatively for the period between April 2016 and January 2024. Methodology: The ADF Unit Root, Johansen Cointegration, Granger Causality, Rolling Window Causality tests, and Variance Decomposition Analysis methods were used in the analysis process. Results: Based on the findings obtained from the paper, it was determined that Bitcoin and Ethereum have no cointegration with selected financial asset classes. Granger causality analysis results indicated that there were unidirectional causalities from Bitcoin and Ethereum prices to Dow Jones Commodity Index prices. In addition to the results of the Rolling Window causality tests, it was also determined that there are some causalities between Bitcoin, Ethereum, and other variables, especially after the 2021-2022 period. Conclusion: It can be concluded that Bitcoin and Ethereum are effective portfolio diversifiers throughout the entire period; however, the diversification effects of Bitcoin and Ethereum weakened towards the end of the review period. Therefore, it can be said that Bitcoin and Ethereum act similarly in the global investment portfolio.

Korkmaz, Ersin; Karabulut, Turgut; Güner, Mehmet

Purpose: The aim of this study is to reveal and compare the effect of working capital management on return on assets with different analysis methods, based on the annual financial statement data of companies in the tourism sector traded in Borsa Istanbul (BIST) in the period 2012-2020. This study aimed to reveal the drawbacks of including in the model variables that are not an element of working capital management.Methodology: Panel data analysis, the analytical hierarchy process and the fuzzy analytical hierarchy process were used to reveal the effect of working capital management variables on return on assets based on the financial statement data of the companies.Results: As a result of the analysis, a significant relationship was identified between the rankings made by using the realized return on assets ratios and the rankings obtained by AHP and FAHP, while no significant relationship was found between the rankings obtained by panel data analysis.Conclusion: Including some variables in the model as a working capital management variable in panel data analysis may cause misinterpretation of the effects of real working capital variables on return on assets. When the model that emerged according to the AHP and FAHP methods was examined, the asset turnover rate and financial leverage ratio variables were determined as the ratios with the lowest effect on return on assets, as the elements of working capital management in the weighting made according to the opinions of the experts.

Koçak, Daimi

Purpose: In this study, drawing on social learning theory, a moderated mediation model was tested. This model examines organizational identification as the mediator and employee unethical tolerance as the moderator in relationships between leader-member exchange (LMX) and unethical pro-organizational be-haviors (UPB).Methodology: The research sample is comprised of 432 full-time employees of a private company operat-ing in the service sector in Turkey.Results: Consistent with the theoretical model, analysis results indicate that organizational identification mediated a positive relationship between LMX and UPB. Furthermore, results supported the moderated mediation model and showed that an indirect effect of LMX on UPB through organizational identification is stronger when EUT is high rather than low.Conclusion: This study contributes to LMX and UBP literature by integrating research on organizational identifi cation and employee unethical tolerance.

Cengiz, Orhan; Manga, Muge

Purpose: The aim of this study is to point out the impact of geopolitical risk on climate change. The CO2 emissions per capita is used as a proxy for climate change. Methodology: In this study, the data sample covers annual data from 1990 to 2015 for 12 selected Latin American and Asian countries. After standard preliminary tests (Cross-sectional dependence tests, CIPS unit root test, and slope homogeneity test), we employ the second-generation estimator - the AMG (Augmented Mean Group) method to explore the long-run relationship between geopolitical risk and CO2 emissions per capita. Results: The AMG findings document that a 1% rise in geopolitical risk escalates CO2 emissions per capita by 0.001%. In addition, economic growth and fossil energy consumption foster CO2 emissions per capita, whereas renewable energy contributes to decreasing CO2 emissions per capita. Conclusion: In recent years, scholars have attempted to explore the impact of geopolitical risk on environmental degradation. According to our results, in Latin American and Asian countries, decreasing geopolitical risk and conflict can impede environmental degradation. In the long run, a robust clean energy policy should be considered in case of geopolitical conflict by the government. Besides, the government should focus on renewable energy policy and substitute non-renewable energy resources with more technology-intensive resources.

Karabulut, Turgut; Sari, Salim Sercan

Purpose: Bitcoin, the most prominent among cryptocurrencies, is a peer-to-peer (P2P) electronic currency and payment system used based on mutual trust. The study aims to measure awareness of Bitcoin, which has recently become popular among investors with its rapidly increasing use. To this end, a questionnaire was applied to the participants to evaluate their opinions and preferences regarding Bitcoin. With this purpose in mind, a questionnaire was applied to the academics of Erzincan Binali Yildirim University in Turkey. Methodology: In the process of analysing the obtained data, frequency analysis and the chi-square test method were used by using the SPSS 26.0 software package. Results: According to the results of the study, it was observed that 51.6% of the academics (159 persons) had knowledge of Bitcoin, and while 31.5% of the academics participating in the study (97 persons) considered they would buy Bitcoin within five years, 57% (176 persons) conceived the use of Bitcoin would increase within ten years. Despite all these positive attitudes, it was also observed that 45.5% (140 people) considered Bitcoin as unreliable and 51.6% (159 persons) would prefer gold instead of using Bitcoin. As for the opinion of academics, it was conduded that gold and other different investment tools would be preferred instead of Bitcoin despite its increasing use. Conclusion: This research is important as it is the first research study in the field, which means that no similar study has been conducted in Turkey before, and it is thus expected to greatly contribute to the literature within the context of the importance and originality of the study.

Bas, Murat; Çinar, Orhan

Purpose: The main purpose of this study is to investigate the mediating role of work engagement (WE) in the relationship between perceived organizational support (POS) and turnover intention (TI). Methodology: In this context, to test the model and hypotheses, research data were collected using a survey method from 427 public employees working in the healthcare sector in Erzincan province of Turkey. The data were analyzed using SPSS and AMOS programs. Results: As a result of the analyses, it was found that perceived organizational support has a positive effect on work engagement and a negative effect on turnover intention, and work engagement and turnover intention variables are negatively correlated. It was also concluded that there was a partial mediating role of work engagement in the relationship between perceived organizational support and turnover intention. Conclusion: In this study, it was determined that WE has a partial intermediary role in the relationship between POS and TI. According to these findings, the support provided to the employee by the organization reduces employee intention to quit. In this context, when organizational management implements practices that will ensure employee commitment in addition to supporting employees and creating this perception, it can further reduce the intention of employees to quit.

Sirin, Mohammed Sabri; Yücel, Ilhami

Purpose: This study aims to investigate the mediating effect of work overload perception on the relationship between supervisor support and work-family conflict experienced by employees. Methodology: The created models and hypotheses were tested on a sample comprising 401 research assistants working at a public university. The data obtained were analyzed using statistical programs. Results: According to the results of the analyses, it was concluded that supervisor support had negative correlation with work-family conflict and work overload perception. In addition, a positive relationship between work overload perception and work-family conflict was observed. Conclusion: Based on the mediation model that was used to test the main hypothesis, it was concluded that work overload perception has a partially mediating effect on the relationship between supervisor support and work-family conflict.