Table 1.

Variables of model

Variable (symbol)		Unit	Source
Carbon emission per capita (COPC)		Metric tons per capita	World Bank, Knoema
Population (POP)		Number	World Bank
GDP per capita (GDPPC)		Current US$	World Bank
Energy intensity (EI)		MJ/$ 2011 PPP GDP	IEA, World Bank
Green bonds (GB)		US$	Climatebonds.net
Green energy index (GEI)	Nuclear consumption	Million tonnes oil equivalent	BP, IEA
	Hydro consumption	Million tonnes oil equivalent	BP, IEA
	Solar consumption	Million tonnes oil equivalent	BP, IEA
	Wind consumption	Million tonnes oil equivalent	BP, IEA
	Biofuels consumption	Thousand barrels per day	BP, IEA, Knoema

Source: Authors’ compilation