• Model selection in multivariate adaptive regressions splines (MARS) using alternative information criteria 

  Bekar Adıgüzel, Meryem; Cengiz, Mehmet Ali (Elsevier Ltd, 2023)

  Multivariate Adaptive Regression Splines (MARS) is a useful non-parametric regression analysis method that can be used for model selection in high-dimensional data. Since MARS can identify and model complex, non-linear ...

• Can Elon Mask's Twitter Posts About Cryptocurrencies Influence Cryptocurrency Markets by Creating a Herding Behavior Bias 

  Hamurcu, Çağrı (Ahmet Arif Eren, 2022)

  The main purpose of this study is to examine the effects of Elon Mask's Twitter posts about cryptocurrencies on cryptocurrency markets within the scope of herding behavior bias. For this purpose, the daily price values and ...

• On a three dimensional higher order system of difference equations 

  Akrour, Youssouf; Kara, Merve; Touafek, Nouressadat; Yazlık, Yasin (Watam Press, 2022)

  In this work, we derive the solutions form of the following three-dimensional system of nonlinear difference equations of higher-order (Formula presented). where the parameters α, β, a, b, A, B and the initial values x−i, ...

• Depremlerin sigortacılık sektörü hisse senetleri üzerinde etkisi olabilir mi? 2020 yılındaki İzmir depremi üzerine bir araştırma 

  Hamurcu, Çağrı (Dokuz Eylül Üniversitesi İktisadi ve İdari Bilimler Fakültesi, 2022)

  Bu çalışmada, depremlerin sigortacılık sektöründe faaliyet gösteren firmaların hisse senetleri üzerindeki etkisinin incelenmesi amaçlanmıştır. Bu amaçla, İzmir şehrinde şiddetli yıkıcı etkiler yaratan 30 Ekim 2020 tarihinde ...

• Impact of COVID-19 first official vaccine approval on precious metals: a behavioral finance approach 

  Hamurcu, Çağrı (Alanya Alaaddin Keykubat Üniversitesi İktisadi, İdari ve Sosyal Bilimler Fakültesi, 2022)

  This research aims to reveal the effect of first official COVID-19 vaccine approval on precious metal prices in terms of return and volatility. Within the context of precious metal, gold, silver, platinum, and palladium ...

• Aile şirketlerinin finansal karar verme süreçleri: planlı davranış teorisi çerçevesinde bir araştırma 

  Duman, Haluk; Yücenurşen, Mehmet (2022)

  Bu çalışmanın amacı, Planlı Davranış Teorisi çerçevesinde aile şirketlerinin finansal karar verme süreçlerini etkileyen faktörleri incelemektir. Araştırmada, Aksaray OSB’de faaliyet gösteren aile şirketleri anakütle olarak ...

• A window dea based efficiency evaluation of the public airports in Turkey: 2014-2019 case 

  Özsoy, Volkan Soner; Pehlivanlı, Edib Ali (Academy Economic Studies, 2022)

  Aviation is strategically important because of its enormous contribution to the economy, as well as being the field of application and production of new technologies. The efficiency of airports comes to the fore in efficiency ...

• Hierarchical groups DEA cross-efficiency and TOPSIS technique: An application on mobile money agents locations 

  Muvingi, Jacob; Peer, Arshad Ahmud Iqbal; Lotfi, Farhad Hosseinzadeh; Özsoy, Volkan Soner (Inderscience Publishers, 2022)

  Ranking of efficient decision-making units (DMUs) allows a further analysis of the data envelopment analysis (DEA) efficient DMUs, where otherwise a high number of efficient DMUs can be identified. The current research ...

• Muhasebe meslek mensuplarının büyük veri analitiği teknolojisi direncine yönelik bir araştırma 

  Yücenurşen, Mehmet (IJMEB, 2021)

  Bu çalışmanın amacı, Statüko Yanlılığı (Status Quo Bias) Teorisi çerçevesinde muhasebe meslek mensuplarının yeni veri analitiği teknolojisi direncine neden olan faktörleri incelemektir. Araştırmada, Aksaray ilinde aktif ...

• Performance management of OECD countries on Covid-19 pandemic: a criticism using data envelopment analysis models 

  Doğan, Mustafa İsa; Özsoy, Volkan Soner; Örkçü, H. Hasan (Emerald Group Holdings Ltd., 2021)

  The Covid-19 pandemic spread rapidly around the world and required strict restriction plans and policies. In most countries around the world, the outbreak of the disease has been serious and has greatly affected the health ...

• How consumer confidence index affects foreign investors' portfolio and equity security investments: a research on Turkey 

  Hamurcu, Çağrı (Celal Bayar Üniversitesi, 2021)

  In this study, it has been investigated whether the consumer confidence index, which is an indicator of investor sensitivity, has an effect on the portfolio and equity security investments of foreign investors. Analyses ...

• A novel approach for determining common weights in two division network DEA: a case study of Science and technology parks in Turkey 

  Özsoy, Volkan Soner; Belgin, Önder; Balkan, Dursun (Routledge, 2022)

  Data Envelopment Analysis is a popular tool for assessing the relative efficiency of units, treated as a whole unit, without considering the internal structure of decision-making units. In contrast to the conventional ...

• Gray’in muhasebe değerleri üzerine ampirik bir değerlendirme 

  Yücenurşen, Mehmet; Karakuş, Mustafa (2021)

  Bu çalışmada, Gray’in teorik olarak ileri sürdüğü muhasebe değerleri olan profesyonellik, tekdüzelik, tutuculuk ve gizliliğe yönelik ampirik bir değerlendirme gerçekleştirmek amaçlanmıştır. Araştırmanın, Türkçe literatürde ...

• The determination of the most suitable inertia weight strategy for particle swarm optimization via the minimax mixed-integer linear programming model 

  Özsoy, Volkan Soner (Emerald Publishing, 2021)

  Purpose This paper aims to consider each strategy of the particle swarm optimization (PSO) as a unit in data envelopment analysis (DEA) and uses the minimax mixed-integer linear programming DEA approach to find the most ...

• On the system of difference equations 

  Kara, M.; Yazlık, Y. (Islamic Azad University, 2020)

  In this paper, we show that the system of difference equations x(n) = x(n-2)y(n-3)/y(n-1)(a(n)+b(n)x(n-2)y(n-3)), y(n) = y(n-2)x(n-3)/x(n-1)(alpha(n)+beta(n)y(n-2)x(n-3)), n is an element of N-0, where the sequences ...

• Global behavior of two-dimensional difference equations system with two period coefficients 

  Kara, Merve; Tollu, Durhasan Turgut; Yazlık, Yasin (Tbilisi Center for Mathematical Sciences, 2020)

  In this paper, we investigate the following system of difference equations x(n+1) = alpha(n)/1 + y(n)x(n-1), y(n+1) = beta(n)/1 + x(n)y(n-1), n is an element of N-0, where the sequences (alpha(n))(n is an element of ...

• Can financial literacy overconfidence be predicted by narcissistic tendencies? 

  Hamurcu, Çağrı; Hamurcu, Hayriye Dilek (Emerald Group Holdings Ltd., 2021)

  Purpose: In this study, it is investigated whether narcissistic tendencies can predict financial literacy overconfidence. Design/methodology/approach: Financial literacy overconfidence is analyzed under these three ...

• Solvability of a system of higher order nonlinear difference equations 

  Kara, Merve; Yazlık, Yasin; Tollu, Durhasan Turgut (Hacettepe University, 2020)

  In this paper we show that the system of difference equations xn = ayn-k + dyn-kxn-(k+l)/bxn-(k+l) + cyn-l, yn = αxn-k + δxn-kyn-(k+l)/βyn-(k+l) + γxn-l, where n ε ℕ0, k and l are positive integers, the parameters a, b, ...

• On a solvable three-dimensional system of difference equations 

  Kara, Merve; Yazlık, Yasin (University of Nis, 2020)

  n this paper, we show that the following three-dimensional system of difference equations (Formula Presented) where the parameters a, b, c, d, e, f and the initial values x−i, y−i, z−i, i ∈ {1, 2, 3}, are real numbers, can ...

• A minimax approach for selecting the overall and stage-level most efficient unit in two stage production processes 

  Özsoy, Volkan Soner; Orkçu, Mediha; Orkçu, H. Hasan (Springer, 2021)

  Data envelopment analysis (DEA) is a very effective management tool in assessing the performance of a set of decision making units (DMUs). In the efficiency evaluation using classic single stage DEA models, the internal ...

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