Bankacılık ve Finans Bölümü Yayın Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/400
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Article Citation - WoS: 12Citation - Scopus: 16Exchange Rate Risk and International Trade: the Role of Third Country Effect(Elsevier Science Sa, 2018) Tunc, Cengiz; Solakoglu, M. Nihat; Babuscu, Senol; Hazar, AdaletUsing the recently launched Exporter Dynamics Database of the World Bank, this paper empirically investigates the role of external exchange rate risk (third-country effect) on trade flows between countries. We find a strong positive influence of external exchange rate risk on exports to a specific destination. However, the effect is more observable in advanced destination countries, countries with low bilateral exchange rate volatility in comparison to external exchange rate volatility, and countries in which export is concentrated among a small number of firms. (C)2018 Elsevier B.V. All rights reserved.Article Citation - WoS: 6Citation - Scopus: 5Exchange Rate Volatility and Trade: External Exchange Rate Volatility Matters(World Scientific Publ Co Pte Ltd, 2020) Babuscu, Senol; Hazar, Adalet; Solakoglu, M. Nihat; Tunc, CengizWe investigate the role of external exchange rate volatility in export in addition to the effect of bilateral exchange rate volatility using country-, sector-, and destination-specific detailed export data of the World Bank Exporter Dynamics Database. The results show that while the bilateral exchange rate volatility has a depressing effect on export, the external exchange rate volatility generates trade-promoting effect on export. However, the magnitude of the effect depends on trade intensity between countries. Furthermore, while the role of external exchange rate volatility diminished after the Global Financial Crisis, the effect of its volatility has become larger. Finally, external exchange rate volatility has a larger trade-promoting effect on export in the presence of high volatilities than the effect in the presence of low volatilities.Article Fractional Frequency Flexible Fourier Form to approximate smooth breaks in unit root testing(2015) Omay, TolgaIn this study, a Fractional Frequency Flexible Fourier Form DF-type unit root test is proposed. The small sample properties of the proposed test are found to be better than that of the integer frequency counterpart. •Fractional Frequency Flexible Fourier Form-DF-type of unit root test is proposed.•The small sample properties of FFFFF-DF-type test are better than EL test.•FFFFF-DF-type test improves the empirical testing performance.•FFFFF-DF-type test prevents type two errors and over-filtration problems.Article Citation - WoS: 91Citation - Scopus: 87Fractional Frequency Flexible Fourier Form To Approximate Smooth Breaks in Unit Root Testing(Elsevier Science Sa, 2015) Omay, TolgaIn this study, a Fractional Frequency Flexible Fourier Form DF-type unit root test is proposed. The small sample properties of the proposed test are found to be better than that of the integer frequency counterpart. (C) 2015 Elsevier B.V. All rights reserved.Article Citation - WoS: 2Citation - Scopus: 3Loan-To Policy: Evidence From Turkish Dual Banking System(Emerald Group Publishing Ltd, 2018) Hepsen, Ali; Pirgaip, BurakPurpose-This paper aims to answer how effective the loan-to-value (LTV) regulation has been since 2011 for conventional and Islamic (participation) banks in Turkey in terms of curbing mortgage loan growth and delinquency[1]. Design/methodology/approach-The authors first use unit root tests and tests of difference in loan and property price data in pre-LTV and post-LTV period. Second, the authors follow Chow test and ordinary least squares regression analyses to test for a structural break when sensitivity of mortgage loan and delinquency growth changes to property price changes considered. Findings-The authors find that two periods are statistically different, while the significance level is lower for Islamic banks. Moreover, loan growth has become less responsive to property price increases; delinquency sensitivity to property price changes has significantly increased in the post-LTV period for conventional banks, while this is not the case for Islamic (participation) banks. Originality/value-This paper not only increases empirical evidence regarding the effectiveness of LTV ratio policy but also fills the gap in the literature by providing a comparison between conventional banks and Islamic (participation) banks.Article Sector-Level Competition and Export: Evidence From Exporter Dynamics Database(World Scientific Publ Co Pte Ltd, 2019) Hazar, Adalet; Solakoglu, M. Nihat; Tunc, Cengiz; Babuscu, SenolWe study the effect of sector-level competition on export by utilizing the Exporter Dynamics Database of the World Bank that provides sector-level competition measure along with destination-specific detailed export data. The results of the analysis show a nonlinear effect of sector-level competition on export. While at less competitive sectors, an increase in competition depresses export, at highly competitive sectors, an increase in competition generates a trade-promoting effect on export. The observed nonlinear effect is robust across sectors and countries. Therefore, productivity of peer firms could generate negative effect on a firm's export performance contrary to the usual positive effect of a firm's own productivity.Article Citation - WoS: 1Citation - Scopus: 1Testing for Unit Roots in Nonlinear Dynamic Heterogeneous Panels With Logistic Smooth Breaks(Mdpi, 2023) Omay, Tolga; Ucar, NuriIn this study, we investigate the validity of the purchasing power parity (PPP) proposition for 34 European and selected global countries. For this purpose, we propose a new unit root test for cross-sectionally dependent heterogeneous panels that allows for gradual structural breaks and symmetric nonlinear adjustment toward the equilibrium level. The alternative hypothesis stationary is obtained by symmetric adjustment due to exponential smooth transition autoregression (ESTAR) around a nonlinear trend. Moreover, we provide small sample properties extensively for the newly proposed test. Hence, this alternative hypothesis has been proven to characterize real exchange rate data (REER) correctly. Thus, the newly proposed tests provide an essential basis for modeling the REER series correctly. Finally, we also derive the approximate asymptotic distribution of the proposed tests using new techniques.Article Unit Root Testing in the Presence of Mean Reverting Jumps: Evidence From US T-Bond Yields(Walter de Gruyter GmbH, 2019) Ilalan, Deniz; Ozel, OzgurMean reversion of financial data, especially interest rates is often tested by linear unit root tests. However, there are times where linear unit root test results can be misleading especially when mean reverting jump formations are at stage. Considering this framework, we provide a new unit root testing methodology and compute its asymptotic critical values via Monte Carlo simulation. Moreover, we numerically compare the power of this generalized mean reversion test with the pioneering linear unit root test in the literature namely the Augmented Dickey Fuller (ADF) test. We deduce that our test is a refinement of ADF test with a higher power. Weapply our findings to US 10-year Treasury bond yields. We aim to shed light to the discussion among researchers whether interest rates can sometimes revert to a long-term constant mean or not from an unorthodox point of view.
