Browsing by Author "Yasar, M."

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Examination of the factors determining the operational and financial performance of airlines: The case of the Turkish international airline market
(2023.01.01) Yasar, M.; Gerede, E.
PURPOSE: Firms that want to obtain an advantageous market position , a sustainable long-term competitive advantage in a competitive market place are engaged in competitive behavior in order to realize these goals. Competitive behavior is realized by competitive moves that they have made under real market conditions or by reactions (retaliation) against these moves. Those who initiate the action (Actors), those who respond to the actions (Responders) and competitive actions constitute the competitive dynamics of an industry. The results of the competitive actions carried out within the scope of competitive dynamics are monitored within the scope of market performance. The aim of this study is to reveal the factors that affect the operational and financial market performance of airline companies competing in the Turkish international airline market.METHODOLOGY: In this context, 26 airlines competing in the Turkish international airline market were evaluated in the context of rival pairs between 2009 and 2018. The analysis of the models designed in the study was carried out by panel regression analysis.FINDINGS: The findings obtained in the study show the relative market share gain of airlines is positively influenced by their firm maturity, relative size, financial resources, total number of flights , fleet homogeneity, it is negatively impacted by their capability to deploy resources. According to research, the relative Revenue Passenger Kilometers is positively impacted by the relative size of the airlines, the same business model, and Load Factor, but negatively impacted by resource deployment capability and competing in the same alliance. While the resource allocation capability and efficiency of the airlines have a positive effect on the net result, firm maturity and total number of flights have a negative effect. It has been revealed that the resource deployment capability of airlines , efficiency of airline firm have a positive effect on financial performance, while firm maturity, the total number of flights , slack resources have a negative effect.IMPLICATIONS: By introducing additional variables-such as fleet homogeneity, business model, strategic alliances, and codesharing - to the variables utilized in prior studies, this research is expected to add to the body of knowledge on competitive dynamics. Airlines will be guided in and before their actions in a competitive marketplace by understanding the circumstances in which they will demonstrate greater operational and financial performance than their rivals. ORIGINALITY , VALUE: Knowing in which situations airlines will show better operational and financial performance against their competitors will guide them in and before their actions in a competitive marketplace.
Investigating the Air Travel-Tourism Relationship Using Granger Causality Analysis: The Case of Turkish Destinations
(2024.01.01) Yasar, M.
One of the main benefits of air transport is that it allows people to travel quickly from one place to another. This allows people to reach their destinations faster than other modes of transport for purposes such as tourism, business and education. The aim of this study is to investigate the causality relationships between air travel and tourism demand by each market segment. The causality relationship between the number of domestic passengers, international passengers and total number of passengers and the number of domestic tourists, international tourists and total number of tourists is analyzed on a monthly basis for the period 2017-2021 in Turkey with Granger causality analysis. The findings revealed a two-way causal relationship between the number of domestic travelers and the demand for domestic tourism, as well as a two-way relationship between the demand for total travelers and the demand for total tourism. There is a unidirectional causal connection between the demand for inbound tourists and the quantity of international travelers. The research is expected to add to the body of work on the outcomes. It will also have implications for those who make decisions about infrastructure and policy.
The Role of Hearing Aids in Improving Dual-Task Gait Performance in Older Adults With Presbycusis: A Cognitive and Motor Analysis
(2024) Soylemez, E.; Soylemez, T.G.; Apaydin, A.S.; Apaydin, Z.K.; Yasar, M.
Background: Cognitive decline is a common challenge faced by older individuals with presbycusis; their performance on dual-task (DT) activities is generally lower compared to those without hearing loss. However, the influence of hearing aids on nonauditory cognitive decline in this population remains unclear. This study aims to investigate the effect of hearing aids on nonauditory DT performance in older adults with presbycusis. Material and methods: This study included older people with presbycusis who used hearing aids (P&HA group), those with presbycusis who did not use hearing aids (PoHA group), and a control group of healthy adults. Forward and backward digit span tests and timed up and go test (TUG) were administered to all individuals. TUG and motor and cognitive (forward and backward digit span) tasks were applied simultaneously to evaluate the participants' DT performance. Results: The study comprised 60 individuals with presbycusis (19 females, 41 males; mean age: 73.23 ± 6.49 years) and 30 healthy adults (15 females, 15 males; mean age: 35.93 ± 8.57 years). Healthy adults performed better than the P&HA and PoHA groups in all the administered tests (p < 0.05). There was a moderate negative relationship between the severity of hearing loss and the forward and backward digit span test performances (p < 0.05). The P&HA group performed better than the PoHA group on the DT cognitive forward and backward digit span tests. Conclusion: The use of hearing aids and their proper fitting are important not only for improving communication skills and reducing listening effort but also for supporting nonauditory cognitive functions, minimizing the risk of falls during DT activities, and enhancing the overall quality of life.
The Role of Hearing Aids in Improving Dual-Task Gait Performance in Older Adults With Presbycusis: A Cognitive and Motor Analysis
(John Wiley and Sons Ltd, 2024) Soylemez, E.; Soylemez, T.G.; Apaydin, A.S.; Apaydin, Z.K.; Yasar, M.
Background: Cognitive decline is a common challenge faced by older individuals with presbycusis; their performance on dual-task (DT) activities is generally lower compared to those without hearing loss. However, the influence of hearing aids on nonauditory cognitive decline in this population remains unclear. This study aims to investigate the effect of hearing aids on nonauditory DT performance in older adults with presbycusis. Material and Methods: This study included older people with presbycusis who used hearing aids (P&HA group), those with presbycusis who did not use hearing aids (PoHA group), and a control group of healthy adults. Forward and backward digit span tests and timed up and go test (TUG) were administered to all individuals. TUG and motor and cognitive (forward and backward digit span) tasks were applied simultaneously to evaluate the participants' DT performance. Results: The study comprised 60 individuals with presbycusis (19 females, 41 males; mean age: 73.23 ± 6.49 years) and 30 healthy adults (15 females, 15 males; mean age: 35.93 ± 8.57 years). Healthy adults performed better than the P&HA and PoHA groups in all the administered tests (p < 0.05). There was a moderate negative relationship between the severity of hearing loss and the forward and backward digit span test performances (p < 0.05). The P&HA group performed better than the PoHA group on the DT cognitive forward and backward digit span tests. Conclusion: The use of hearing aids and their proper fitting are important not only for improving communication skills and reducing listening effort but also for supporting nonauditory cognitive functions, minimizing the risk of falls during DT activities, and enhancing the overall quality of life.