ON DIMENSION REDUCTIONS IN DATA ENVELOPMENT ANALYSIS WITH AN ILLUSTRATIVE APPLICATION TO TURKISH BANKING SECTOR PERFORMANCE

Year 2019, Issue: 24, 259 - 268, 24.07.2019

Gizay Daver , Güray Küçükkocaoğlu

https://doi.org/10.18092/ulikidince.491820

Abstract

In this study we tested the Turkish Banking Sector
Performance development and the usage of various methodologies. For this
purpose we used several data envelopment analysis(DEA) performance measurement
systematics from 2002.12 to 2017.06. Proposed DEA models include dimension
reduction techniques. The first one is principal component analysis which is
abbreviated as PCA and the second one is correlation based DEA model
construction. We investigated performance change over time and found that banks
in Turkish Banking Sector should take steps now for maintaining their improved
performances. Policies implemented after the 2001 crisis had positive effects
during the 2008 crisis period in the Turkish banking sector, but gains should
be sustained. We also found that our main model which uses four input and four
output factors yields similar results with the investigated dimension reduction
technique approaches.

Keywords

Performance, DEA, PCA, Turkey, Financial Crisis

ON DIMENSION REDUCTIONS IN DATA ENVELOPMENT ANALYSIS WITH AN ILLUSTRATIVE APPLICATION TO TURKISH BANKING SECTOR PERFORMANCE

Abstract

Bu çalışmada Türk
Bankacılık Sektörü Performansı gelişimini ve çeşitli metodolojilerin
kullanımını test ettik. Bu amaçla 2002.12 ile 2017.06 arasında çeşitli veri
zarflama analizi (DEA) performans ölçüm sistematiği kullandık. Önerilen DEA
modelleri, boyut azaltma tekniklerini içermektedir. Birincisi, PCA olarak
kısaltılmış olan temel bileşen analizi ve ikincisi ise korelasyon bazlı DEA
model kurulmasıdır. Zaman içerisinde performans değişimini inceledik ve Türk
Bankacılık Sektöründeki bankaların, artan performanslarını sürdürmek için
adımlar atmaları gerektiğini tespit ettik. 2001 krizinden sonra uygulanan
politikalar, 2008 kriz döneminde Türk bankacılık sektöründe olumlu etkiler
yaratmış, ancak kazanımlar sürdürülebilmelidir. Dört girdi ve dört çıktı
faktörü kullanan ana modelimizin, araştırılan boyut azaltma tekniği
yaklaşımları ile benzer sonuçlar verdiğini de bulduk.

Keywords

Performans, DEA, PCA, Türkiye, Finansal Kriz

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