Ekonomi ve Finans Bölümü Koleksiyonu
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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.
- ItemFrom capture to culture: the asymmetric impact of education on Türkiye's fisheries sector(Springer, 2025-08) Canbay, Şerif; Şengül, Serkan; Karahan Dursun, Pınar; 355807; 414023The aim of this study is to analyze the causal effect of the net schooling rate, as a proxy for human capital, on saltwater fisheries and aquaculture in five coastal regions of T & uuml;rkiye (Marmara, Aegean, Mediterranean, Western Black Sea, and Eastern Black Sea). In the empirical analysis, we use the panel data for the period 2009-2022 and employ the dependent variables that are the amount of fish production obtained through fishing in Model 1 and the amount of fish produced through aquaculture in Model 2. The study applies the panel bootstrap Granger causality method, considering both structural heterogeneities and cross-sectional dependencies. The results show that the effect of educational attainment on fish production activities varies both by type of production and by regional conditions. In the Mediterranean and Aegean regions, educational attainment has strong effects on both fishing and aquaculture, while in some regions, it has a negative effect on production. The study contributes to the literature by presenting the effects of education, a socio-economic variable, at the sectoral level in detail; it also provides an empirical basis for the development of region-specific sustainability policies.
- ItemInternational integration and agricultural productivity in Kazakhstan: a Fourier ARDL approach(Emerald, 2025-11) Şengül, Serkan; Yıldız, Hakan; Canbay, Şerif; 355807Purpose – This study investigates the effects of Kazakhstan’s membership in international economic organizations such as the Organization of Turkic States (OTS), Eurasian Economic Union (EAEU) and Shanghai Cooperation Organization (SCO) on agricultural total factor productivity (AGTFP) during the period 1992–2022. It aims to understand how institutional integration, trade openness and environmental factors influence agricultural productivity in a transitioning economy. Design/methodology/approach – The analysis employs the fractional frequency Fourier ARDL (FFF-ARDL) method, which allows for modeling potential unknown nonlinear structural breaks. Annual data on AGTFP, agricultural GDP, foreign trade ratio and agricultural carbon emissions are analyzed. Dummy variables are used to capture Kazakhstan’s membership in each international organization and comparative models are estimated. Findings – The results reveal that EAEU membership has a positive and significant impact on AGTFP, while OTS membership shows a negative effect and SCO membership has no significant effect. Agricultural carbon emissions positively influence productivity in the long run but have a short-run limiting effect. Foreign trade openness limits long-run productivity, reflecting structural dependencies. Research limitations/implications – The study is limited to Kazakhstan and focuses on sector-level productivity; cross-country comparisons could provide further insights. Originality/value – This study offers a novel empirical investigation into the long-term effects of international institutional integration on agricultural productivity using advanced econometric modeling. By isolating the impacts of multiple international organizations, it contributes to the understanding of how trade and institutional dynamics shape agricultural performance in developing economies.
