Kaplan, Muhittin
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Yönetim Bilimleri Fakültesi, İktisat Bölümü
İktisat Bölümü, başta Türkiye ve çevre ülkeler olmak üzere küresel ekonomileri anlayan, var olan sorunları analiz ederken, iktisadi kuramları ve kavramları yetkin ve özgün bir şekilde kullanma becerisine sahip bireyler yetiştirmeyi amaçlamaktadır.
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Muhittin Kaplan
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İş Ekonomisi, Çevre Bilimleri ve Ekoloji, Alan Çalışmaları, Uluslararası İlişkiler, Kamu Yönetimi
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Yayın The causal relationship between public investment in renewable energy and climate change performance index(Econjournals, 2025) Vergil, Hasan; Mursal, Marwa; Kaplan, Muhittin; Khan, Asad ul Islam; Yönetim Bilimleri Fakültesi, İktisat BölümüAddressing the current environmental challenges requires optimizing climate actions and understanding the complex relationships among them. This paper aims to provide insights into how public investment in renewable energy influences various dimensions of climate change, including emissions, efficiency, renewable energy deployment, and policy effectiveness. This study seeks to explore the causal connection between public investment in renewable energy and the Climate Change Performance Indicator (CPI) from 2007 to 2017, utilizing data provided by German Watch. The method used is Dumitrescu and Hurlin’s (2012) Granger Causality. The study unveils a unidirectional causality from Renewable Energy Investment (REI) to climate change performance. Additionally, it emphasizes the critical role of energy efficiency in attracting investments in renewable energy. Surprisingly, the study finds that REI influences the quality of climate policy. Furthermore, the study identifies a bi-directional causality between a renewable energy share and REI. The contribution of the paper lies in its analysis of public investment in renewable energy, covering areas beyond just public finance for R&D in renewable energy, as also exploring the causal link between this investment and CPI. It offers policymakers insights on how financial governmental interventions can effectively drive climate action.Yayın Beyond GARCH: Intraday insights into the exchange rate and stock price volatility dynamics in Borsa Istanbul sectors(Shaheed Benazir Bhutto Women University, 2024) Abdul-Rahman, Mutawakil; Khan, Asad ul Islam; Kaplan, Muhittin; Yönetim Bilimleri Fakültesi, İktisat BölümüThis study investigated the impact of exchange rate volatility on sectoral stock volatility by employing the intraday volatility measure directly calculated from the original data, using daily data from 27 Borsa Istanbul sectors between April 29, 2003, and April 25, 2023. In the literature, GARCH models are commonly used to study the volatility spillovers between exchange rates and stock prices, typically using aggregate data. However, the GARCH family models provide inefficient and biased estimates if they are misspecified. Moreover, using aggregate-level data may lead to biased and misleading conclusions. The research used intraday volatility measures to overcome the shortcomings of GARCH models. The ordinary least squares (OLS), GARCH (1,1) methods, and Garman and Klass (1980) volatility estimator are used. The empirical results showed that the estimates from each method vary significantly, and these disparities in the results might be due to misspecification in GARCH (1,1) models. The intraday volatility model estimation results showed that although stock price volatilities in all sectors are positively and significantly affected by exchange rate volatility, their magnitudes vary significantly. Taken together, this implies the presence of vast heterogeneities in the responses of sectoral stock price volatilities to exchange rate volatility. The results encourage policymakers to pay special attention to these heterogeneities to prevent capital flights and underinvestment. Additionally, the findings assist investors in making more effective decisions by helping them adapt their investment strategies to factor in exchange rate fluctuations and mitigate the impact of unexpected events in the exchange rate market.