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Table 2 ADF unit root test results

From: Healthcare expenditure and GDP in Ethiopia from 1995 to 2014: a time-series analysis

Variables Level First difference
z-statistic Prob. z-statistic Prob.
GDPp − 0.449 0.9853 − 3.948*** 0.0104
THEp − 1.332 0.8799 − 4.666*** 0.0008
GHEp − 1.202 0.9101 − 4.644*** 0.0009
  1. ***Significance at the level 0.05%