From: Does energy efficiency, renewable energy and effective capital promote economic growth in the emerging 7 economies? New evidence from CS-ARDL model
t-Statistic
Kao cointegration test
 Modified Dickey-Fuller
− 2.191**
 Dickey-Fuller
− 1.533*
 ADF
− 1.642*
 Unadjusted Modified Dickey-Fuller
− 1.919**
 Unadjusted Dickey-Fuller
− 1.424*