Bankacılık ve Finans Bölümü Yayın Koleksiyonu
Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/400
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Article The effects of terrorist activities on foreign direct investment: nonlinear Evidence(2013) Omay, Tolga; Takay Araz, Bahar; Ilalan, DenizIn this study, we examine the relationship between foreign direct investment and terrorist incidents that took place in Turkey for the period from 1991:12 to 2003:12. This research contributes to the literature by checking for a possible non-linear relationship between terrorism and foreign direct investment. The data used to measure the intensity of terrorism were collected from the newspapers of Turkey, and therefore are limited to the direct signals given to the market. Empirical evidence from both linear and non-linear models confirms that terrorism has a large significant negative impact on foreign direct investment. With respect to the nonlinear model, the impact of terrorism on the foreign direct investment is more severe during periods of high terrorism when the intensity of terrorism passes the threshold level 3.725.Article Citation - WoS: 2Citation - Scopus: 2Testing 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 Citation - WoS: 11Citation - Scopus: 12Energy Consumption and Growth: New Evidence From a Non-Linear Panel and a Sample of Developing Countries(World Scientific Publ Co Pte Ltd, 2015) Apergis, Nicholas; Ozcelebi, Hulya; Omay, TolgaThis paper investigates the relationship between economic growth and energy consumption through non-linear causality tests. Eight developing countries from Europe and Central Asia spanning the period 1993 to 2008 are selected for the purpose of panel empirical analysis. Panel unit root and panel cointegration tests with and without considering cross section dependency (CD) problems are implemented. Next, linear panel cointegration tests are employed and, finally, a two-regime Dynamic Panel Smooth Transition Vector Error Correction (PSTRVEC) model is estimated for testing the presence of non-linear short-and long-run causality. To this end, a new estimator, called the Dynamic Non-linear Pooled Common Correlated Effect Estimator (DNPCCEE) is proposed. The empirical findings indicate that short and long-run causalities are regime-dependent.Article Citation - WoS: 96Citation - Scopus: 96Fractional 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.