Table 6.

Estimated permanent and transitory effects in log scale on NO${}_{\mathrm{x}}$ and NO${}_2$ for each station.

Stations	Effect	Nitrogen Oxides			Nitrogen Dioxide
		Estimate	S.E.	t-Statistic	Estimate	S.E.	t-Statistic
Senato	Perm. eff. ${\delta }_1$	0.38	0.19	2.03 **	0.29	0.12	2.40 **
	Trans. eff. ${\delta }_0$	−0.12	0.16	−0.76	−0.14	0.11	−1.25
Verziere	Perm. eff. ${\delta }_1$	0.26	0.21	1.27	0.22	0.15	1.50
	Trans. eff. ${\delta }_0$	−0.01	0.18	−0.05	−0.06	0.14	−0.40
Liguria	Perm. eff. ${\delta }_1$	0.12	0.22	0.54	0.20	0.16	1.25
	Trans. eff. ${\delta }_0$	−0.02	0.19	−0.10	−0.10	0.15	−0.67
Marche	Perm. eff. ${\delta }_1$	0.15	0.19	0.80	0.23	0.13	1.82 *
	Trans. eff. ${\delta }_0$	−0.11	0.17	−0.63	−0.19	0.13	1.56
Citta Studi	Perm. eff. ${\delta }_1$	0.35	0.29	1.19	0.25	0.19	1.30
	Trans. eff. ${\delta }_0$	0.08	0.25	0.30	0.02	0.18	0.10

Note 1: * p < 0.10, ** p < 0.05.