ADF Test	Level			First Different			Second Different
ADF Test	Intercept	Intercept & Trend	None	Intercept	Intercept & Trend	None	Intercept	Intercept & Trend	None
GDP	5.412	0.821	10.411	0.441	−4.760^**	2.140	−4.503^**	−4.529^*	−5.121^***
TOUR	1.936	−0.442	4.221	−3.192^*	−5.140^**	−2.167^*	−4.774^**	−4.673^*	−4.539^***
EXR	0.057	−3.264	2.344	−3.284^*	−3.189	−1.618^*	−4.777^**	−4.834^**	−5.072^***