Military expenditure, financial development and environmental degradation in Turkey: A comparison of CO2 emissions and ecological footprint

This study investigates the long run equilibrium relationship among military expenditure, financial development, energy use, economic growth and environmental degradation in Turkey for the period of 1960–2014. Ecological footprint and carbon dioxide emissions are used as separate proxies for environmental degradation. Fully modified ordinary least squares (FMOLS) estimator results suggest that military expenditure, energy use and economic growth increase the environmental degradation while financial development improves the environmental quality in Turkey. Toda Yamamoto (1995) causality test results reveal that there is a unidirectional causality running from military expenditure to CO2 emissions and ecological footprint; and a bidirectional causality between military expenditure and economic growth. The findings of the study confirm the existence of destruction theory for the case of Turkey

Volatility spillovers among leading cryptocurrencies and US energy and technology companies

Abstract This study investigates volatility spillovers and network connectedness among four cryptocurrencies (Bitcoin, Ethereum, Tether, and BNB coin), four energy companies (Exxon Mobil, Chevron, ConocoPhillips, and Nextera Energy), and four mega-technology companies (Apple, Microsoft, Alphabet, and Amazon) in the US. We analyze data for the period November 15, 2017–October 28, 2022 using methodologies in Diebold and Yilmaz (Int J Forecast 28(1):57–66, 2012) and Baruník and Křehlík (J Financ Economet 16(2):271–296 2018). Our analysis shows the COVID-19 pandemic amplified volatility spillovers, thereby intensifying the impact of financial contagion between markets. This finding indicates the impact of the pandemic on the US economy heightened risk transmission across markets. Moreover, we show that Bitcoin, Ethereum, Chevron, ConocoPhilips, Apple, and Microsoft are net volatility transmitters, while Tether, BNB, Exxon Mobil, Nextera Energy, Alphabet, and Amazon are net receivers Our results suggest that short-term volatility spillovers outweigh medium- and long-term spillovers, and that investors should be more concerned about short-term repercussions because they do not have enough time to act quickly to protect themselves from market risks when the US market is affected. Furthermore, in contrast to short-term dynamics, longer term patterns display superior hedging efficiency. The net-pairwise directional spillovers show that Alphabet and Amazon are the highest shock transmitters to other companies. The findings in this study have implications for both investors and policymakers