İktisadi ve İdari Bilimler Fakültesi

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Citation - WoS: 1
Citation - Scopus: 2
A new causal discovery heuristic
(Springer, 2018) Prestwich, S. D.; Özkan, İbrahim; Tarim, S. A.; Ozkan, I.; 6641; 169580; Yönetim Bilişim Sistemleri
Probabilistic methods for causal discovery are based on the detection of patterns of correlation between variables. They are based on statistical theory and have revolutionised the study of causality. However, when correlation itself is unreliable, so are probabilistic methods: unusual data can lead to spurious causal links, while nonmonotonic functional relationships between variables can prevent the detection of causal links. We describe a new heuristic method for inferring causality between two continuous variables, based on randomness and unimodality tests and making few assumptions about the data. We evaluate the method against probabilistic and additive noise algorithms on real and artificial datasets, and show that it performs competitively.
Citation - Scopus: 0
A New Clustering Method With Fuzzy Approach Based On Takagi-Sugeno Model in Queuing Systems
(IGI Global, 2013) Zanjanbar, F.G.; Şentarli, I.
In this paper, the authors propose a new hard clustering method to provide objective knowledge on field of fuzzy queuing system. In this method, locally linear controllers are extracted and translated into the first-order Takagi-Sugeno rule base fuzzy model. In this extraction process, the region of fuzzy subspaces of available inputs corresponding to different implications is used to obtain the clusters of outputs of the queuing system. Then, the multiple regression functions associated with these separate clusters are used to interpret the performance of queuing systems. An application of the method also is presented and the performance of the queuing system is discussed. Copyright © 2013, IGI Global.
Citation - WoS: 12
Citation - Scopus: 16
An overview of revenue management and dynamic pricing models in hotel business
(Edp Sciences S A, 2018) Bandalouski, Andrei M.; Kovalyov, Mikhail Y.; Pesch, Erwin; Tarim, S. Armagan; 6641
Basic concepts and brief description of revenue management models and decision tools in the hotel business are presented. An overview of the relevant literature on dynamic pricing, forecasting methods and optimization models is provided. The main ideas of the authors' customized revenue management method for the hotel business are presented.
Citation - Scopus: 2
Copyright Protection By Robust Digital Image Watermarking in Unsecured Communication Channels
(Institute of Advanced Engineering and Science, 2017) Alasafi, L.; Göksu, T.; Albayati, A.
The transition from analog technologies to digital technologies has increased the ever-growing concern for protection and authentication of digital content and data. Owners of digital content of any type are seeking and exploring new technologies for the protection of copyrighted multimedia content. Multimedia protection has become an issue in recent years, and to deal with this issue, researchers are continuously searching for and exploring new effective and efficient technologies. This thesis study has been prepared in order to increase the invisibility and durability of invisible watermarking by using the multilayer Discrete Wavelet Transform (DWT) in the frequency plane and embedding two marks into an image for the purpose of authentication and copyright when digital content travels through an unsecured channel. A novel watermarking algorithm has been proposed based on five active positions and on using two marks. In addition to the extraction process, watermarking images will be subjected to a set of attack tests. The evaluation criteria have been the bases of assessing the value of SNR, PNSR, MAE and RMSE for both the watermarking images and the watermarking images after attacks, followed by the invisibility of the watermarking being measured before and after the attacks. Our lab results show high robustness and high quality images obtaining value for both SNR and PNSR. © 2017 Institute of Advanced Engineering and Science. All rights reserved.
Citation - Scopus: 10
Effectiveness of SMEs in Turkish economy and agricultural industry sector
(2004) Baykal, N.A.; Gunes, E.
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: 0
Enlightenment In the Colony: the Jewish Question and the Crisis of Postcolonial Culture
(Routledge Journals, Taylor & Francis Ltd, 2011) Karadeli, Sedat Cem; Karadeli, Cem; 21252; Siyaset Bilimi ve Uluslararası İlişkiler
Citation - WoS: 5
Citation - Scopus: 4
Exchange Rate Volatility and Trade: External Exchange Rate Volatility Matters
(World Scientific Publ Co Pte Ltd, 2020) Tunc, Cengiz; Solakoğlu, Mehmet Nihat; Babuscu, Senol; Hazar, Adalet; Solakoglu, M. Nihat; 161529; Yönetim Bilişim Sistemleri
We investigate the role of external exchange rate volatility in export in addition to the effect of bilateral exchange rate volatility using country-, sector-, and destination-specific detailed export data of the World Bank Exporter Dynamics Database. The results show that while the bilateral exchange rate volatility has a depressing effect on export, the external exchange rate volatility generates trade-promoting effect on export. However, the magnitude of the effect depends on trade intensity between countries. Furthermore, while the role of external exchange rate volatility diminished after the Global Financial Crisis, the effect of its volatility has become larger. Finally, external exchange rate volatility has a larger trade-promoting effect on export in the presence of high volatilities than the effect in the presence of low volatilities.
Citation - Scopus: 14
Export-led economic growth and the case of Brazil: An empirical research
(Routledge, 2019) Temiz Dinç, D.; Gökmen, Aytaç; Gökmen, A.; 52039; 17660; Uluslararası Ticaret ve Finansman
The world has been globalized much more than ever before and this process integrates the economies of countries. Moreover, one means of integrating the economies of countries is trade. In this instance, the export-led economic growth emerges as a considerable determinant. Export-led economic growth is beneficial for the countries since it facilitates the inflow of foreign exchange, increases production, creates new employment opportunities and enhances the overall commercial volume. In this study, the correlation between export-led economic growth is explored for Brazil. Therefore, according to the findings of this paper as well as econometric and statistical applications, there is a bi-directional causality in Brazil since 1960s between economic development and exports in the long-run (this could also be termed as feedback); furthermore, in the short-run, there is export-led economic growth. The novelty of this paper is that, it is one of the latest studies investigating export-led economic growth for Brazil. © 2019, © 2019 Taylor & Francis Group, LLC.
Citation - WoS: 4
Citation - Scopus: 3
Fixed Point Results Via Simulation Functions in the Context of Quasi-Metric Space
(Univ Nis, Fac Sci Math, 2018) Fulga, Andreea; Tas, Aysegul; 29252
In this paper, we investigate the existing non-unique fixed points of certain mappings, via simulation functions in the context of quasi-metric space. Our main results generalize and unify several existing results on the topic in the literature.
Citation - Scopus: 4
Foreign Direct Investment & Its Correlation to Economics: The case of Brazil
(Routledge, 2019) Dinç, D.T.; Gökmen, Aytaç; Gökmen, A.; 52039; 17660; Uluslararası Ticaret ve Finansman
Capital accumulation is the first and foremost important factor to induce economic growth and development in a country. Yet, not every country in the world is bestowed with abundant capital. Thus, in this instance foreign direct investment (FDI) emerges as a good option to supply the necessary amount of capital to countries which are deprived of the necessary capital stock. Moreover, FDI, besides being a catalyst of economic development, is a significant means of transferring technology, knowledge, managerial know-how and constitutes new potentials to create employment opportunities, increase the production volume and enhance the foreign trade balance. Furthermore, the impact of FDI inflow on the economic growth is researched in this paper for Brazil by means of utilizing various econometric methods for the period of 1970–2017. According to the results of this study there is no positive causality between economic growth and FDI inflow in the short-run. Yet, there is a positive and significant causality between FDI inflow and economic growth in the long-run as well as this stems from the fact that investments lead to positive results gradually in the long-term which also means that investments shall be converted into production as much as possible. Moreover, the novelty of this paper is that it is one of the most up-to-date studies to research FDI–economic growth correlation on Brazil in the literature. © 2019, © 2019 Taylor & Francis Group, LLC.
Citation - Scopus: 10
Foreign Direct Investment (FDI) and Export Relation in Turkey: 1991–2010
(2011) Temiz, Dilek; Temiz, D.; Gökmen, A.; Gökmen, Aytaç; 17660; 52039; Uluslararası Ticaret ve Finansman
Foreign direct investment (FDI) is an important element in development of economic power with regard to growth. FDI is an efficient tool to transfer new technologies, managerial skills, knowledge, capital flow and so on. On the other hand, exportation is another means to integrate the economy of a country with that of the world and secure economic growth as well enhancing economic advantages. In this article, we attempt to research the relationship between FDI and export. The article begins with the definition of FDI theory, explains the motives fostering FDI, FDI and Turkey, FDI and export relation theoretically, and concludes with an empirical analysis of FDI and export in Turkey. The empirical research investigates the relationship between export and FDI by using monthly time series data for the Turkish economy over the period from December 1991 to October 2010. The study applies of the following econometric techniques: unit root test, Johansen cointegration test, vector error correction model (VECM), and Granger causality test. The cointegration analysis suggests long-run equilibrium relationship between the examined variables. The results of the Granger causality test showed a causal relationship between these variables. The causality results are consistent with the results reported by the vector error correction model (VECM). © Taylor & Francis Group, LLC.
Citation - Scopus: 5
Foreign Direct Investment and Its Impact on Economic Performance: The Case of Turkey and Nigeria
(Routledge, 2015) Temiz, Dilek; Temiz, D.; Gökmen, A.; Gökmen, Aytaç; Abubakar, M.S.; 52039; 17660; Uluslararası Ticaret ve Finansman
Foreign Direct Investment (FDI) has been affecting global business affairs for decades. A country, whether developed or developing, necessitates more FDI entry than other countries because the FDI inflow may bring certain advantages such as capital accumulation, knowledge, know-how transfer, and obtainment of updated technology. Thus, the entry of FDI into a host country is expected to reveal positive aftermaths. The objective of this study is to analyze the impact of FDI entry into Nigeria and Turkey for the years 1970–2012 by using econometric methods such as VAR, VECM, unit root test, cointegration test, causality test, impulse-response functions, and variance decomposition. As a result, it was estimated that there is no positive impact of FDI entry on economic growth in Nigeria and in Turkey. © 2015, Copyright © Taylor & Francis Group, LLC.
Citation - WoS: 12
Citation - Scopus: 18
Gender gap in financial inclusion: Evidence from MENA
(Univ Oviedo, 2019) Ozsuca, Ekin Ayse; 237965
This study aims to analyze the gender dimension of financial inclusion in MENA countries. Using the World Bank's 2017 Global Findex Database, it explores the underlying factors of gender differences in formal financial services usage via Fairlie decomposition method. The findings of the study indicate that a significant portion of the disparity in financial inclusion is attributable to employment, while age and tertiary education are also found as contributing factors to the financial inclusion gap. Another notable finding is that upper income quintiles contribute positively to the gender gap, indeed to a greater extent compared to lower income groups.
Citation - WoS: 2
Citation - Scopus: 3
How globalization affects the operational efficiency of emerging market firms?: A comparative analysis on Turkish SMEs
(Univ Oviedo, 2018) Akdogan, Ece Ceylan; Akdoğan, Ece Ceylan; 17735; Bankacılık ve Finans
This paper examines the impact of globalization on the operational efficiency of emerging market firms by concentrating on the financial outcomes of a firm's main operations through focusing on operating income and cash conversion cycle as well as on their possible causes in an emerging market, Turkey. The findings indicate that globalization significantly deteriorates the operating income and lengthens the cash conversion cycle of Turkish firms. Besides, globalization is found to increase sales of SMEs and decrease sales of large companies significantly and the impact on operating income of large companies is observed to be stronger. Globalization is also found to lead a softening in Turkish firm's terms of sales and enable Turkish SMEs to benefit from better terms of purchase.
Citation - WoS: 10
Is The J-Curve Effect Observable In Turkish Agricultural Sector?
(Univ Zagreb, Fac Agriculture, 2006) Yazici, Mehmet; Yazıcı, Mehmet; 144084; İktisat
This paper investigates whether or not the J-curve hypothesis holds in Turkish agricultural sector. The analysis is conducted using the model the most commonly employed in j-curve literature. Based on the data covering the period from 1986: I to 1998: III, our results indicate that, following devaluation, agricultural trade balance initially improves, then worsens, and then improves again. This pattern shows that J-curve effect does not exist in Turkish agricultural sector. Another important finding is that devaluation worsens the trade balance of the sector in the long run, a result contradicting with the earlier findings for the Turkish economy as a whole.
Citation - WoS: 0
Islamization of Turkey under the AKP rule
(Routledge Journals, Taylor & Francis Ltd, 2013) Turk, H. Bahadir; Türk, Hasan Bahadır; 18664; Siyaset Bilimi ve Uluslararası İlişkiler
Citation - WoS: 1
Citation - Scopus: 1
Model selection uncertainties and model averaging in autoregressive time series models
(Isoss Publ, 2012) Islam, M. Qamarul; Yazıcı, Mehmet; Yazici, Mehmet; 144084; İktisat
Selecting the correct lag order is necessary in order to avoid model specification errors in autoregressive (AR) time series models. Here we explore the problem of lag order selection in such models. This study provides an in-depth but easy understanding of the model selection mechanism to the practitioners in various fields of applied research. Several interesting findings are reported and through these the pitfalls of the model selection procedures are exposed. In particular, we show that the whole exercise of model selection and subsequent statistical inference invariably depends upon unknown entities, namely the true values of parameters in the model. The model averaging technique is proposed as an alternative to the common practice of model selection and it is shown that, as a result, the properties of post-model-selection estimates substantially improve.
Citation - Scopus: 3
Modeling heterogeneous fleet vehicle allocation problem with emissions considerations
(Bentham Science Publishers, 2021) Kazanç, H.C.; Soysal, M.; Çimen, M.
Aims: This study proposes a bi-objective linear integer programming model for heterogeneous fleet VAP with emissions considerations. Profit maximization and emissions minimization objectives are employed to handle economic and environmental sustainability purposes. Background: Our literature survey shows that there is no model for the heterogeneous fleet VAP with emissions considerations that simultaneously consider vehicle heterogeneity, penalty costs for unmet demands, and emissions from transportation operations. Objective: The model is employed to also make several scenario analyses on sustainable freight logistics management to understand the trade-offs among economic and environmental objectives. In freight transportation problems, decision-makers need to be able to maintain profitability and to reduce emissions. Methods: In this study, a bi-objective linear integer programming model is proposed for a heterogeneous fleet Vehicle Allocation Problem (VAP) with emissions considerations encountered in the field of sustainable freight transportation. Results: In the numerical analyses, various practical assumptions that can be confronted by decision-makers in real life are discussed. In each analysis, total profit and emissions amounts are revealed along with several other KPIs. The results of the analyses provided in this study could also be useful in terms of understanding the relations among pillars of sustainability in VAPs. Conclusion: It is thought that the proposed model has the potential to aid decision-making processes in sustainable logistics management. In the base case analyses, the total profit obtained under profit maximization is about nine times higher than that obtained under emissions minimization. When the aim is to minimize emissions, the total emissions are found to be nearly one-tenth of that of profit maximization. Supported by also additional scenario analyses, it can be concluded that it might not economically viable to be environmentally-friendly for companies. Therefore, companies have to be encouraged or forced to take environmentally and socially responsible actions through legislation. The analyses demonstrated that various legislative policies on emissions may affect the transportation plans differently in such vehicle allocation systems. © 2021 Kazanç et al.
Citation - WoS: 10
Citation - Scopus: 9
Pax Ottomanica No More! The "Peace" Discourse in Turkish Foreign Policy in the Post-Davutoglu Era and the Prolonged Syrian Crisis
(Wiley, 2019) Atac, C. Akca; 17826
Turkey's eight years between 2008 and 2016 has been dominated by Ahmet Davutoglu's vision of foreign policy, which was derived from his multi-edition book Strategic Depth (2000). In order to be able to present itself in its larger periphery as a pro-active, trustworthy actor, Davutoglu argued, Turkey needed to change the foreign-policy paradigms with which it was stranded. As the Strategic Depth vision unfolded, it drew explicit parallels between modern Turkey and the Ottoman neighborhood policy. Turkey-Syria relations since 2008 had been providing the seekers of neo-Ottomanist tendencies in the contemporary Turkish foreign policy with abundant examples, because Syria, once an Ottoman territory and always a challenge to modern Turkey, came to be the first poster country in the shift towards Turkey's imperial awakening. In the post-Davutoglu era, however, the rhetoric and practices of the past eight years seemed suddenly to disappear from the use of the Turkish agents of foreign policy; the new code of terms and actions to replace the Strategic Depth version is yet to be decided. This study seeks to pin down the neo-imperialist character of Turkey's foreign-policy discourse of the aforementioned eight years and contribute to discussions of the Turkish aspiration of neo-Ottomanism with focus on the Syrian crisis through the Justice and Development Party's re-invented peace discourse. In doing so, it aims to find out and elaborate on the current tendencies of Turkish foreign policy, which are no longer as explicit and articulated as they were during Davutoglu's ministry and prime ministry. As Turkey's cross-border operation to Syria - the Euphrates Shield - ends and another one in Idlib begins, a discursive analysis stretching from Davutoglu's diplomatic "zero problems" with Damascus to the military use of ground troops and air force is timely. Such an endeavor would be essential in understanding the spectacular swing from one edge to the other in Turkey's inclination over a phantasmagorical empire.
Citation - WoS: 2
Citation - Scopus: 2
Profitability effects of financial globalization in an emerging market banking industry: insights into Turkey
(Univ Rijeka, Fac Ecomomics, 2019) Akdogan, Ece C.; Akdoğan, Ece Ceylan; Ozsuca, Ekin Ayse; 237965; Bankacılık ve Finans
The massive ,financial liberalization followed by accelerating financial globalization leaded to significant structural changes in the financial sector: Since financial institutions play a dominant role in functioning of financial sector, especially in emerging markets where banking industries are generally among the most sensitive sectors to increased interconnectedness of financial markets, haw financial globalization actually affects the efficiency of financial intermediation is a vital question. However; although there exists plenty of research focusing on financial integration, impacts of financial globalization is untouched. Hence, this study investigates the bank profitability effects of financial globalization through focusing on an emerging market, Turkey and searches for any potential differences that may prevail among banks with different ownership structures. The findings indicate that while the market based profitability measures improve with financial globalization, the accounting based measures deteriorate pinpointing to an over optimism in the market which in turn brings in mispricing problems. Besides, ownership structure is found to affect the market based measures where banks with domestic and private ownerships are found to benefit more. However; since no significant distinction could be detected among any of the ownership compositions for accounting based profitability measures, such misappraisals seem to foster the optimism in the market.

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