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. 2020 Sep 3;11:1924. doi: 10.3389/fpsyg.2020.01924

TABLE 2.

Unit root test.

ADF F-statistics
PP F-statistics
Variable Level 1st Diff. Level 1st Diff.
DAXR −6.893713*** −8.54426*** −7.057616*** −37.2059****
GERC −1.293963 −3.969976** −0.971366 −14.51473***
GERD −5.935247*** −4.359161*** 3.147762 −6.393867***
FTMR −4.631659 −11.55646*** −9.451458*** −30.1619***
ITLD −1.127702 −4.174362*** −0.400067 −11.35456***
ITLC −1.300231 −5.849862** −0.488626 −8.372171***
IBER −4.27056 −9.985616*** −9.446574*** −63.65801***
SPD −1.506727 −10.32241*** 0.159422 −10.09496***
SPC 4.552953 −7.028486*** −0.374729 −7.97616***
LSER −8.775255*** −8.591517*** −8.768878*** −47.87539***
UKC −7.816325*** −1.578091 2.746256 −9.61778***
UKD 7.429147*** −12.36282*** 2.571441 −12.31254***
SPR −12.89506*** −6.022076*** −12.13962*** −37.8073***
USC −6.847753*** −5.567572** 4.310638** −7.46537***
USD 3.138569 −5.097646** 7.384682*** −5.006879***
NSR −13.66594*** −13.40744*** −12.64235*** −34.28961***

*, ** and *** denote 10, 5, and 1% level of significance, respectively. Source: Author’s calculation.