Table 2 Correlation matrix for inputs... | Emerald Publishing

Table 2

Correlation matrix for inputs and outputs, 2004–2017

	Labor	NFAV	TNV	Energy consumption	Passenger -km	Freight ton-KM	Value added	CO₂ emissions
Labor	1.0000
NFAV	0.5606^*	1.0000
TNV	0.3301^*	0.6200^*	1.0000
Energy consumption	0.7038^*	0.5750^*	0.3271^*	1.0000
Passenger-KM	0.2501^*	0.4413^*	0.6424^*	0.2731^*	1.0000
Freight ton-KM	0.3069^*	0.2219^*	0.3428^*	0.6184^*	0.1111	1.0000
Value added	0.6117^*	0.6842^*	0.7165^*	0.6113^*	0.5753^*	0.4963^*	1.0000
CO₂ emissions	0.6904^*	0.5553^*	0.3147^*	0.9990^*	0.2626^*	0.6271^*	0.5981^*	1.0000

	Labor	NFAV	TNV	Energy consumption	Passenger -km	Freight ton-KM	Value added	CO₂ emissions
Labor	1.0000
NFAV	0.5606^*	1.0000
TNV	0.3301^*	0.6200^*	1.0000
Energy consumption	0.7038^*	0.5750^*	0.3271^*	1.0000
Passenger-KM	0.2501^*	0.4413^*	0.6424^*	0.2731^*	1.0000
Freight ton-KM	0.3069^*	0.2219^*	0.3428^*	0.6184^*	0.1111	1.0000
Value added	0.6117^*	0.6842^*	0.7165^*	0.6113^*	0.5753^*	0.4963^*	1.0000
CO₂ emissions	0.6904^*	0.5553^*	0.3147^*	0.9990^*	0.2626^*	0.6271^*	0.5981^*	1.0000

Note(s): ^* Correlation is significant at the 1% level (2-tailed)

Source(s): Authors' own work