oylum şehvez ergüzel

Dr. oylum şehvez ergüzel


Research Focus & Metrics

Academic Career Length

11Years (2016-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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17 August 2021 in The Journal of International Trade & Economic Development
Verified
Journal Article
Closed access
SÖSeren Özsoy
Seren Özsoy
OEoylum şehvez ergüzel
oylum şehvez ergüzel
AEAhmet Yağmur Ersoy
Ahmet Yağmur Ersoy
MSMetin Saygılı
Metin Saygılı
This study argues that easy access to new information using information and communication technologies (ICT) will bring both more technological development and information about new markets, together catalyzing high technology (high-tech) production. This paper aims to show the impact of digitalization on the technology intensity of export. We use the ICT Development Index (IDI) as a proxy for the digitalization level of a country and the value of the exports of high-tech products as a proxy for the technology intensity of export. IDI comprises three components, including ICT access, usage and skills. These statistics reflect the ICT development of the country. To analyze the relevant relationship, we use panel data on countries between 2007 and 2017. The system-generalized method of moments (system GMM) dynamic panel estimator is utilized in the estimations, permitting us to control for potential endogeneity problems between the main dependent and independent variables. Results show that in developing countries, IDI has a significant effect on the export of high-tech products. In addition, the significance of the main components of IDI varies. These results suggest that developing countries striving to increase the export of high-tech products should invest more in ICT.

31 December 2019 in Alphanumeric Journal
Verified
Journal Article
Open access
PDF file
SGSamet Güner
Samet Güner
OEoylum şehvez ergüzel
oylum şehvez ergüzel
HCHalil İbRahim Cebeci̇
Halil İbRahim Cebeci̇
Avrupa, Asya ve Kuzey Amerika’nın en işlek havalimanlarının operasyonel etkinliğinin karşılaştırmalı olarak analiz edildiği bu çalışmanın iki amacı vardır. Birincisi, analize dâhil olan her bir havalimanını uluslararası rakipleri ile kıyaslayarak göreli performansını ortaya koymak ve etkinliği düşük olanlar için çözüm önerileri sunmaktır. Çalışmanın ikinci amacı ise bölgesel bir karşılaştırma yaparak Avrupa, Asya ve Kuzey Amerika havalimanları arasındaki performans farklarını incelemektir. Bu bağlamda, her bölgeden beş adet olmak üzere toplam on beş havalimanı araştırmaya dâhil edilmiştir. Havalimanlarının karşılaştırmalı performans analizinde radyal olmayan veri zarflama analizi kullanılmıştır. Yapılan analizler neticesinde etkin ve etkin olmayan havalimanları tespit edilmiştir. Havalimanı etkinsizliğinin en büyük nedeninin havalimanı alanının etkin bir şekilde kullanılamamasından kaynaklandığı belirlenmiştir. Ayrıca, Asya bölgesinde faaliyet gösteren havalimanlarının ortalama etkinliğinin rakiplerine göre daha yüksek olduğu tespit edilmiştir.

13 September 2016 in SpringerPlus
Verified
Journal Article
Open access
PDF file
OEoylum şehvez ergüzel
oylum şehvez ergüzel
HTHakan Tunahan
Hakan Tunahan
SESinan Esen
Sinan Esen
The study aims to analyze the export performance of countries and of cities within them to identify synchronized or unsynchronized movement between them. In the empirical part of the study, the measurements used to analyze the export performance of the countries included in the literature are applied to establish the export performance of a single city—Sakarya, Turkey. These measurements include the Herfindahl–Hirchman product and market concentration indices, the Lawrence index, the trade complementarity index, and the Grubel–Lloyd intra-industry index, as well as additional indicators with local or regional contexts. The limited number of studies analyzing the export competitiveness of a single city with relevant formats in the literature reveal the significance of the study.

31 March 2025 in Chaos Theory and Applications
Verified
Journal Article
Open access
PDF file
OEoylum şehvez ergüzel
oylum şehvez ergüzel
Financial markets have been characterized by various financial crises and unpredictable fluctuations and price movements. While traditional finance theories, which assume that financial markets are composed of rational participants, fail to explain the market dynamics that cause crises, chaos theory provides a powerful framework to make sense of the unpredictable, deterministic nature of markets. Chaos theory claims that market fluctuations are not random but have a specific mathematical pattern.This study presents a systematic literature review addressing the relationship between chaos theory and financial crises and speculative bubbles. By analyzing articles from the Web of Science database, its relationship with crisis and bubble dynamics, and the main methodological approaches. This study explores the effectiveness of chaos theory in understanding financial instability in the context of financial crises and bubbles by examining the research questions identified for the application of chaos theory in finance through Preferred Reporting Items for Systematic Reviews and Meta-Analyses methodology and keyword analysis.

31 December 2019 in Alphanumeric Journal
Verified
Journal Article
Open access
PDF file
OEoylum şehvez ergüzel
oylum şehvez ergüzel
HTHakan Tunahan
Hakan Tunahan
SESinan Esen
Sinan Esen
Increased competition with globalization has led multinational companies and suppliers to find cost-effective solutions to ensure competitive advantage. This tendency causes enterprises to shift their production to partially lower-cost markets. However, this approach ignores unpredictable and hidden costs and risks, especially in supply. Therefore, “The Strategy of Best Cost Country Sourcing“ has begun to gain importance. The aim of this study is to propose a model for the determination of the risks in the selection of suppliers under the “Best Cost Country Sourcing Strategy”. With the model, firm specific financal risks, national specific financial risks and global risks affecting Small and Medium Size Enterprices (SMEs) in 11 European Union countries were analyzed with the fuzzy logic method between 2006-2016. Küreselleşmeyle birlikte artan rekabet, çok uluslu şirketleri ve tedarikçilerini rekabet avantajı sağlayabilmeleri amacıyla, özellikle maliyet etkin çözümler bulmaya yönlendirmiştir. Bu yönelim, işletmelerin üretimlerini kısmi olarak daha düşük maliyetli pazarlara kaydırmalarına neden olmuştur. Ancak bu yaklaşım, özellikle tedarikte öngörülemeyen ve gömülü maliyetleri ve riskleri göz ardı etmektedir Bu nedenle “En İyi Ülkeden Tedarik Stratejisi” gittikçe önem kazanmaya başlamıştır. Bu çalışmanın amacı, “En İyi Ülkeden Tedarik Stratejisi” kapsamında tedarikçilerin seçiminde risklerinin belirlenmesine yönelik bir model önerisi sunmaktır. Oluşturulan model ile 11 Avrupa Birliği ülkesinde yerleşik KOBİ’leri etkileyen ülkeye ve firmalara özgü mali riskler ve küresel riskler 2006-2016 yılları arasında bulanık mantık yöntemi ile analize tabi tutulmuştur.