Sanat ve Sosyal Bilimler Fakültesi
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Browsing Sanat ve Sosyal Bilimler Fakültesi by ORCID "0000-0001-9891-9477"
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- ItemAssessing competition in the Turkish cement industry: insights from the boone indicator(Emerald Publishing Limited, 2024-08) Yıldız, Hakan; Köprücü, Yılmaz; Şengül, Serkan; 355807Purpose – This paper investigates the degree of competitiveness within the Turkish cement industry, employing firm-level quarterly data spanning from 2008 to 2016. Design/methodology/approach – To assess the level and trajectory of competition among Turkish cement firms, we employ the Boone indicator (β) as formulated by Boone (2008). This indicator, rooted in the concept of relative profit differences (RPD), serves as a robust metric for gauging competitive dynamics. According to the ß indicator, firms exhibiting higher relative efficiency are expected to secure greater profits and market shares in a fiercely competitive market. Additionally, we utilize concentration indices for the purpose of revealing comparable findings. Findings – Empirical findings reveal that an enhancement in firms’ efficiency corresponds to a proportionally modest increase in either market share or profits, implying a lower degree of competition within the Turkish cement industry. Although the specific magnitudes of ß estimates exhibit temporal fluctuations, we may conclude that the Turkish cement industry does not conform to the ideals of perfect competition. The concentration indices calculated on the sample also support this result. Research limitations/implications – This research is limited to the Turkish cement companies over the period 2008–2016. Originality/value – The studies measuring the level of competition in the Turkish cement sector are generally based on concentration ratios. In this study, we assess the competition level by using a different methodology based on parametric procedures.
- ItemCovid-19 pandemisinin Türkiye bankacılık sektöründeki sistemik risk üzerine etkileri: MES analizi ile karşılaştırmalı bir inceleme(Muhasebe ve Finansman Öğretim Üyeleri Bilim ve Araştırma Derneği, 2025-01) Şengül, Serkan; 355807Bu çalışma, Türkiye’deki bankacılık sektörünün COVID-19 pandemisi öncesi ve sonrası dönemdeki sistemik risk seviyelerini analiz etmektedir. 2016-2023 yılları arasında Borsa İstanbul'a kote altı bankanın (Akbank, İş Bankası, Garanti BBVA, Yapı Kredi, Halkbank ve Vakıfbank) Marjinal Beklenen Açık (Marginal Expected Shortfall-MES), koşullu korelasyon ve koşullu volatilite gibi finansal risk göstergelerine dayanan analiz, pandeminin sektörde kırılganlıkları artırdığını ortaya koymaktadır. Sonuçlar, pandemi süresince uygulanan genişletici politikaların bankaların kısa vadeli likidite ihtiyaçlarını karşılamasına rağmen uzun vadede sistemik riski yükselttiğini göstermektedir. Ayrıca, pandemi sonrası dönemde Türkiye'deki ani politika değişiklikleri ve merkez bankası bağımsızlığına dair belirsizliklerin finansal istikrarı zayıflattığı gözlemlenmiştir. Çalışma, Türkiye’de finansal düzenlemelerin kriz dönemlerinde daha dayanıklı bir bankacılık yapısının geliştirilmesi için stratejik önemini vurgulamaktadır.
- ItemDynamics of Wheat Production In Early Republican Türkiye (1925–1960)(AVAZ Akademik Düşünce Derneği, 2025-05) Canbay, Şerif; Şengül, Serkan; 278780; 355807This study aims to analyze the socioeconomic and energy-based factors determining wheat production in Türkiye between 1925 and 1960 using econometric methodology. In the early Republican period, the agricultural sector was structured as one of the main axes of economic development, and wheat, as a strategic crop, was at the center of both production policies and support mechanisms. In this study, wheat production is explained by variables such as per capita income level, number of students enrolled in primary school, electricity production and crude oil price, and the ARDL bounds test approach is used in the model established with annual data. The findings reveal that electricity generation and economic growth support production in the long run, whereas the education indicator has a limiting effect on production. The lagged effects of oil prices, on the other hand, indicate that cost pressures have negative effects on production over time. Short-run analyses reveal that the effects of variables vary over time and that production decisions are affected not only by technical but also by structural transformation processes. The study provides a historical data-based contribution to explain the multidimensional structure of agricultural production in the first 35 years of the Republic.
- ItemEconomic and Demographic Effects of Public Pension Expenditures: The Case of Türkiye(Sivas Cumhuriyet University, 2025-02) Şengül, Serkan; 355807This study investigates the economic and demographic factors affecting public pension expenditures in Türkiye and provides significantinformation about the sustainability of the country's social security system. Using annual data from 1980 to 2019, the study employed the ARDL bounds testing approach to examine the short and long-run effects of GDP per capita, public debt, tax revenues, and the elderly dependency ratio on pension expenditures. The 2001 economic crisis led to a structural break, which is modeled by adding a dummy variable. The results show that GDP per capita reduces pension expenditures in the long run, reflecting the mitigating effect of economic growth on fiscal pressure. In contrast, public debt exerts a notably positive impact, highlighting the fiscal burden of pension financing through borrowing. Tax revenues show a limited but positive effect, while the elderly dependency ratio emerges as the most influential determinant, highlighting the challenges posed by the demographic transition. The short-run analysis confirms a rapid return to equilibrium, pointing to a robust error correction mechanism. The findings underscore the need for social security reforms, including measures to raise the retirement age, increase private pension participation, and address demographic challenges. Despite its contributions, the study is limited by not including variables such as health expenditures and labor market dynamics. Nevertheless, it provides a valuable framework for policymakers to develop growth-oriented policies, ensure fiscal discipline, and promote sustainable social security systems. These insights are relevant not only for Türkiye but also for other countries facing similar demographic and economic pressures, making this study an important contribution to the ongoing debate on pension system reforms.
- ItemEvaluating Environmental Performance in the Turkish Cement Industry(Springer, 2025-04) Yıldız, Hakan; Şengül, Serkan; Köprücü, Yılmaz; 355807; Tsounis, Nicholas; Vlachvei, AspasiaThe purpose of this study is to investigate the environmental performance of the Turkish cement industry. Employing the data set of 8 firms operating in the cement industry and using Data Envelopment Analysis, we estimate the CO2 efficiency in the industry. The empirical findings suggest that the average carbon efficiency in the sector is approximately 71%, indicating substantial room for efficiency enhancement through innovative production techniques and alternative fueluse. However, asignificant reduction intechnical efficiency hasbeen observable over the years. Promoting sustainable practices and investing in technological advancements can reverse this trend. Also, such policies can reduce the industry’s carbon footprint, thus it may be possible to combat greenhouse gas emissions and achieve the targets set in this regard.
- ItemGovernment Support and SME Growth in Türkiye: A Romer Model Approach with Ridge Regression(Kilis 7 Aralık Üniversitesi, 2025-05) Şengül, Serkan; Karahan Dursun, Pınar; 355807; 414023Purpose: This study aims to analyze the growth performance of Small and Medium Enterprises (SMEs) in Türkiye using the Romer (1990) endogenous growth model. The focus is on examining the effects of government support, technological progress, and human capital on SME growth. Design/methodology: The study employs Ridge regression analysis on a dataset spanning the period 2015–2022. Variables such as government support, R&D expenditures, patent applications, human capital, and imports are included, aligning with the assumptions of Romer’s model. The structured approach addresses multicollinearity issues, ensuring robust parameter estimates. Findings: The results indicate that government support significantly enhances the growth performance of SMEs. Technological progress and human capital are confirmed as key drivers of economic growth in line with Romer’s model. While R&D expenditures and imports positively influence production, patent applications exhibit a negative short-term effect, suggesting a delayed commercialization process. Limitations: The dataset covers a limited timeframe (2015–2022), which restricts long-term impact assessments. Future studies could expand the analysis to include a longer timeframe and alternative econometric techniques. Originality/Value: This study is among the first to analyze the role of government support on SME growth in Türkiye through the lens of Romer’s endogenous growth model. The use of Ridge regression to address multicollinearity and the focus on micro-level data provide a unique contribution to the literature.
- ItemThe Dynamics of Energy Import Dependence in the Baltic States(Düzce University, 2025-04) Şengül, Serkan; 355807This study investigates the determinants of energy import dependency in the Baltic states (Estonia, Latvia, and Lithuania) using panel data from 1995 to 2021. Employing panel ARDL and FMOLS methods, the analysis identifies long-term relationships between energy import dependency and key factors such as renewable energy consumption, trade, carbon intensity, industrial competitiveness, and export quality. Findings reveal that while renewable energy use and high export quality reduce dependency, carbon intensity and industrialization increase it. These results highlight the Baltic states' transition towards energy independence, contributing to discussions on regional energy security, sustainability, and European integration within the framework of SDG-7.
- ItemTürkiye'nin karadeniz ekonomik işbirliği örgütü (KEİB) ve Türki cumhuriyetlerle ilişkileri(Ekin, 2024-10) Şengül, Serkan; 355807; Bayraç, Hüseyin Naci; Doğan, Emrah
