Investigating the Effect of Oil Revenue Shocks on Business Cycles and the Synchronism of Cycles with Selected OECD Countries

Table 1

Summary of the unit root test result.

Variables	At level		First-order difference
	ADF test stat	Order of integration	ADF test stat	Order of integration
CYCLE	−2.412	—	−4.667	I(1)
LRE	−2.594	—	−3.756	I(1)
LG	−1.387	—	−3.942	I(1)
LROIL	−3.294	—	−4.651	I(1)
SHOCKT	−1.814	—	−3.397	I(1)
SHOCKP	−1.263	—	−3.681	I(1)
Note:	Critical value; 1% = −3.736; 5% = −2.988; 10% = −2.634		Critical value: 1% = −3.737; 5% = −2.990; 10% = −2.635