Table A1 Results of the unit root test...

Table A1

Results of the unit root test for the variables for the transmission subsystem

Variable	Test statistic	1% Critical value	5% Critical value	10% Critical value	p-value
Frequency of outages
Dickey–Fuller	−3.691	−3.502	−2.888	−2.578	0.0001
Phillips–Perron	−5.062	−3.501	−2.888	−2.578	0.0001
Duration of outages
Dickey–Fuller	−5.389	−3.502	−2.888	−2.578	0.0005
Phillips–Perron	−5.062	−3.501	−2.888	−2.578	0.0000
System shutdowns
Dickey–Fuller	−5.325	−3.502	−2.888	−2.578	0.0006
Phillips–Perron	−8.173	−3.501	−2.888	−2.578	0.0000
Maintenance and repair costs
Dickey–Fuller	−3.977	−3.502	−2.888	−2.578	0.0001
Phillips–Perron	−3.134	−3.501	−2.888	−2.578	0.4592
Rainfall
Dickey–Fuller	−9.819	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−6.687	−3.501	−2.888	−2.578	0.0000
Trees
Dickey–Fuller	−5.499	−4.032	−3.447	−3.147	0.3765
Phillips–Perron	−11.739	−3.501	−2.888	−2.578	0.0000
Technical faults
Dickey–Fuller	−4.523	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−6.502	−3.502	−2.888	−2.578	0.0000
Failed equipment
Dickey–Fuller	−5.982	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−9.409	−3.501	−2.888	−2.578	0.0000
System overload
Dickey–Fuller	−5.377	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−8.291	−3.501	−2.888	−2.578	0.0000
Theft and Vandalism
Dickey–Fuller	−6.391	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−8.987	−3.501	−2.888	−2.578	0.0000

Variable	Test statistic	1% Critical value	5% Critical value	10% Critical value	p-value
Frequency of outages
Dickey–Fuller	−3.691	−3.502	−2.888	−2.578	0.0001
Phillips–Perron	−5.062	−3.501	−2.888	−2.578	0.0001
Duration of outages
Dickey–Fuller	−5.389	−3.502	−2.888	−2.578	0.0005
Phillips–Perron	−5.062	−3.501	−2.888	−2.578	0.0000
System shutdowns
Dickey–Fuller	−5.325	−3.502	−2.888	−2.578	0.0006
Phillips–Perron	−8.173	−3.501	−2.888	−2.578	0.0000
Maintenance and repair costs
Dickey–Fuller	−3.977	−3.502	−2.888	−2.578	0.0001
Phillips–Perron	−3.134	−3.501	−2.888	−2.578	0.4592
Rainfall
Dickey–Fuller	−9.819	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−6.687	−3.501	−2.888	−2.578	0.0000
Trees
Dickey–Fuller	−5.499	−4.032	−3.447	−3.147	0.3765
Phillips–Perron	−11.739	−3.501	−2.888	−2.578	0.0000
Technical faults
Dickey–Fuller	−4.523	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−6.502	−3.502	−2.888	−2.578	0.0000
Failed equipment
Dickey–Fuller	−5.982	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−9.409	−3.501	−2.888	−2.578	0.0000
System overload
Dickey–Fuller	−5.377	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−8.291	−3.501	−2.888	−2.578	0.0000
Theft and Vandalism
Dickey–Fuller	−6.391	−3.502	−2.888	−2.578	0.0000
Phillips–Perron	−8.987	−3.501	−2.888	−2.578	0.0000

Source(s): STATA software 17 output

Sharing Unavailable