Table 2.

T-statistics.

Variable	T-statistics	5% confidence level	Probability
${С}_1$	–3.60	–2.22	0.46
${С}_2$	–1.16	–3.67	0.89
${С}_3$	–3.61	–3.67	0.89
${С}_4$	–3.62	–2.00	0.57
${С}_5$	–3.61	–3.59	0.05
${С}_6$	–2.54	–1.76	0.07
${С}_7$	–2.20	–3.38	0.04

Source: calculated by the authors.