Integrated DEA Models and Grey System Theory to Evaluate Past-to-Future Performance: A Case of Indian Electricity Industry

Table 7

Correlation coefficient: March 2014 data.

	Staff cost	Energy purchase	Other expenses	Equity capital	Net income	Net profit	Basic EPS
Staff cost	1	0.8094686	0.8975678	0.4946254	0.8205856	0.779173	0.049587
Energy purchase	0.8094686	1	0.9465775	0.408433	0.9657305	0.8404919	0.0218223
Other expenses	0.8975678	0.9465775	1	0.5341933	0.9271514	0.8063402	0.0046019
Equity capital	0.4946254	0.408433	0.5341933	1	0.434463	0.4620127	−0.3408736
Net income	0.8205856	0.9657305	0.9271514	0.434463	1	0.9435955	0.1093055
Net profit	0.779173	0.8404919	0.8063402	0.4620127	0.9435955	1	0.1777289
Basic EPS	0.049587	0.0218223	0.0046019	−0.3408736	0.1093055	0.1777289	1