An Empirical Study on Relationship between Residents’ Disposable Income and CPI Based on TVECM: Application of Bootstrap SupLM Testing for Threshold Cointegration

Table 3

Unit root test results of variables.

Variable	ADF test		PP test
	Test value	5% critical value	Test value	5% critical value
SR	−0.146	−2.933	0.293	−2.934
D(SR)	−4.629	−1.949	−13.339	−1.949
CPI	−1.505	−2.939	0.011	−2.931
D(CPI)	−5.626	−1.950	−8.117	−1.949