Pedroni's cointegration tests:
No. of Panel units: 20 Regressors: 1
No. of obs.: 13680 Avg obs. per unit: 684
Data has been time-demeaned.
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Test Stats. Panel Group
---------------+----------------------
v 3.739 .
rho -3.059 -2.76
t -2.194 -2.026
adf -2.075 -1.729
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All test statistics are distributed N(0,1), under a null of no cointegration,
and diverge to negative infinity (save for panel v).