Okur, Fatih; Karcıoğlu, Reşat

The impact of shadow banking on financial stability remains a controversial issue today due to the size and complexity of these activities and the inadequate regulatory frameworks for systemic risks. In this context, shadow banking has become the focus of financial regulators due to its potential effects on financial stability. Therefore, this study was conducted to understand the impact of shadow banking on financial stability. In this study, the relationship between shadow banking and financial instability is examined using the VAR method for the example of the United States, covering the period 2000-2020. In order to create an accurate model, firstly unit root tests were performed, followed by autocorrelation and heteroscedasticity tests. The findings were found to be significant and Johansen cointegration test was applied. In the cointegration results, it was seen that the series were cointegrated, that is, they moved together in the long run. Finally, a Granger causality test was conducted between shadow banking and financial instability, and according to the empirical findings, it was concluded that there was a causality from shadow banking to financial instability for the period in question.

Tosunoğlu, Büşra; Karcıoğlu, Reşat

Bu çalışmanın amacı, yeşil muhasebe ile ilgili bilimsel çalışmaların bibliyometrik göstergeler açısından incelenmesidir. Bu kapsamda Web of Science (WOS) veri tabanında taratılan yayınlar, ilgili literatür doğrultusunda belirlenen konu başlıkları ve içeriklerine göre sınıflandırılmıştır. Çalışmadaki bibliyometrik veriler, 2010-2021 yıllarını kapsamakta olup söz konusu taramada erişime açık toplam 893 makaleye ulaşılmıştır. Analiz sonuçlarına göre 2020 yılı, yeşil muhasebe konusuna ilişkin en fazla makalenin yer aldığı yıldır. Dünya çapındaki duruma bakıldığında ise Amerika Birleşik Devletleri ilk sırada yer almakta olup en etkin dergi “Journal of Environmental Accounting and Management”dir. Anahtar kelime açısından inceleme sonuçlarına bakıldığında ise çalışmaların büyük çoğunluğunun sürdürülebilirlik boyutuyla ele alındığı söylenebilmektedir.

Karcıoğlu, Reşat; Yalçın, Selçuk

In this study, the best performing companies of BIST were determined and the performances of different\rportfolios which consists of the stocks of these companies were analyzed. The Intuinistionic Fuzzy TOPSIS\rmethod was used in the selection of stocks to be included in the portfolios. In the study, 15 different portfolios\rwere created over 5 years and the performances of these portfolios were compared with each other and with the\rBIST 100 index. İt has been determined that portfolios which are created with stocks selected with the\rIntuinistionic Fuzzy TOPSIS method perform much better than the BIST 100 index in both rising and falling\rmarkets. As a result of the study, it was concluded that the Intuinistionic Fuzzy TOPSIS method is useful for\rdetermining the stocks to be included in the portfolio and it would be beneficial for investors to use this method\rwhen creating a portfolio.