Health Economics Review

Table 3 Unit root test results

From: Socio-economic determinants of life expectancy in Nigeria (1980 – 2011)

	Augumented Dickey-Fuller				Philip-Perron
	Without Intercept		With Intercept		Without Intercept		With Intercept
	Levels	1 ^st Diff	Levels	1 ^st Diff	Levels	1 ^st Diff	Levels	1 ^st Diff
LLEXP	−2.19	−7.56**	−2.87	−7.31**	−1.90	−7.00**	−2.82	−6.85**
LGHE	−1.27	−7.04**	−1.61	−7.10**	−1.21	−7.00**	−1.53	−7.10**
LEXRT	−1.55	−4.77**	−0.94	−5.04**	−1.57	−4.77**	−1.04	−5.15**
LPCI	−0.82	−5.22**	−3.89	−5.60**	−0.08	−5.37**	−3.50	−5.75**
LUPR	−0.84	−5.73**	−2.03	−5.76**	−0.75	−5.76**	−2.00	−5.76**
LSECER	−2.72	−3.90**	−1.90	−3.95*	−2.56	−3.42*	−2.99	−5.64**

*Null hypothesis rejected at 5% **Null hypothesis rejected at 1%.
Source: Authors’ computation.

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ISSN: 2191-1991

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