Prof. Dr. Veli Yılancı'nın "Convergence of aggregate and sectoral nitrogen oxides in G7 countries for 1750–2019: Evidence from a new panel Fourier threshold unit root test." adlı makalesi SSCI-E'de endekslenen Journal of Cleaner Production dergisinde yayınlandı

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One of the major pollutants in the atmospheric space is nitrogen oxide (NO_x) emissions is, and industrialized countries are responsible for a substantial share of this air pollutant at the global level. Among developed countries, G7 countries (Canada, France, Germany, Italy, Japan, UK, and the US) were responsible for 12% of the global nitrogen oxide emissions in 2019. Nitrogen oxide emissions increased by almost 280 times between 1750 and 2019 in this set of countries. For this reason, this study concentrates on this group of countries. Besides, it is rational to test the convergence of NO_x emissions at the sectoral level for designing effective environmental policies. Therefore, this paper aims to explore the convergence pattern of aggregate and sectoral NO_x emission levels in G7 countries covering long-span data, from 1750 to 2019. Agriculture, energy production, industry, residential-commercial-other (RCO), transport, and waste are the main sectors where nitrogen oxides are emitted from. For this purpose, we utilize the panel Fourier threshold unit root test, which allows for the possibility of nonlinearity in the series. Besides, the test is able to capture gradual