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Table 2 Summary of unit root test results.

From: Response of economic growth to the dynamics of service sector in Nigeria

Variables Augmented Dickey–Fuller (ADF) Phillip perron (PP)
Level First difference I(d) Level First difference I(d)
LEDU 3.120 − 7.6725* I(1) − 3.081 − 10.560* I(1)
LHLT 0.036 − 9.992* I(1) − 3.867** − 18.447* I(0)
LGFCF − 3.040* − 6.232 I(0) − 3.040* − 6.235 I(1)
LLFPR 0.224 − 3.511* I(1) − 0.429 − 3.4801* I(1)
LGDP − 1.504 − 3.395** I(1) − 2.571 − 3.243** I(0)
LTRC − 2.402 − 7.961* I(1) − 2.260 − 9.116* I(1)
CC − 1.7585 − 4.067* I(1) − 1.886 − 4.081* I(1)
GE − 2.263 − 7.219* I(1) − 2.399 − 7.087* I(1)
  1. *, **, and *** implies significances at 1%, 5%, and 10%, respectively