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All Journal Mimbar Sekolah Dasar Global Advances in Business Studies
Yildirim, Hasan Hüseyin
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Economics, Econometrics & Finance Education

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Efficiency analysis of banks included in the BIST Banking Index Yildirim, Hasan Hüseyin; Yildirim, Cevriye Yüksel; Rençber, Ömer Faruk
Global Advances in Business Studies Vol. 5 No. 1 (2026): Global Advances in Business Studies (GABS)
Publisher : Ifma Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55584/Gabs.005.01.3

Abstract

In the globalized economy, the financial sector is a cornerstone of national economic stability. Within this sector, banks hold a predominant position, and their performance is critically linked to overall economic health. Given its substantial economic weight and deep interconnections with other industries, inefficiency in the banking sector can have significant repercussions. Therefore, measuring efficiency is paramount. Efficiency, defined as the effectiveness with which an institution achieves its predetermined goals, is often analyzed in banking using data envelopment analysis (DEA). This method not only measures the relative efficiency of banks but also provides a roadmap for underperforming ones to improve by identifying optimal resource allocation. By evaluating how effectively banks utilize their inputs to generate outputs, DEA highlights strengths and weaknesses, enabling more efficient operations and a stronger competitive position. This study employs DEA to investigate the efficiency of 10 banks listed on the BIST Bank Index from 2017 to 2023. The analysis uses the size of assets, number of employees, and revenues as input variables, while return on assets, return on equity, and net profit margin serve as the output variables. The results reveal distinct performance patterns: A group of banks, namely Akbank, Garanti Bank, İş Bank (C), and Yapı ve Kredi Bank, maintained a state of full efficiency throughout the entire 2017-2023 period; In contrast, Albaraka Türk and Şekerbank exhibited significant fluctuations in their efficiency scores over time; TSKB experienced a notable period of serious inefficiency, particularly in 2022. In conclusion, DEA serves as a vital analytical tool for the banking sector, offering clear insights into performance levels and providing actionable guidance for inefficient banks to enhance their operations.
The Effectiveness of Concrete-Pictorial-Abstract Learning Strategy in Teaching Mixtures of Science Subjects to Students with Intellectual Skills Disabilities Yıldırım, Hasan Hüseyin; Karabulut, Havva Aysun
Mimbar Sekolah Dasar Vol 10, No 1 (2023)
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53400/mimbar-sd.v10i1.53231

Abstract

The aim of this research is to examine the effectiveness of the concrete-pictorial-abstract teaching strategy presented with the direct teaching method in teaching the subject of mixtures, which is one of the science subjects, to students with intellectual disabilities. The study used multiple-probe model with a probe phase, one of the single-subject research models. While the dependent variable of the research was the level of showing the mixtures of the students participating in the study; the independent variable is the concrete-pictorial-abstract teaching strategy presented with the direct teaching method. The research was conducted with two girls and one boy living in Bolu, diagnosed with intellectual disability, and attending primary school. The data collected in the study were analyzed through visual analysis. As a result of the research, it has been observed that the concrete-pictorial-abstract learning strategy is effective in teaching the subject of mixtures to students with intellectual disabilities, that the permanence of this subject learned by the students can be maintained one and three weeks after the end of the education, and that all students can generalize this learning to different environments and tools.
Co-Authors Karabulut, Havva Aysun Rençber, Ömer Faruk Yildirim, Cevriye Yüksel