Table 6. Output 5.

Poisson regression				Number of obs = 706
				LR chi2(7) = 1484.25
				Prob > chi2 = 0.0000
Log likelihood = -7671.1288				Pseudo R2 = 0.0882
articles	Coef.	Std. Err.	z	P>|z|	[95% Conf. Interval]
1.male	.0386934	.0221662	1.75	0.081	-.0047516	.0821384
discid
1	-.0528417	.020838	-2.54	0.011	-.0936834	-.0119999
2	-.1954824	.0251267	-778	0.000	-.2447298	-.1462349
countryid
1	.7058535	.0212108	33.28	0.000	.6642811	.7474259
2	.3255295	.0274387	11.86	0.000	.2717507	.3793083
yeardeg	-.00845	.0009701	-8.71	0.000	-.0103513	-.0065486
_cons	19.46308	1.931067	10.08	0.000	15.67826	23.2479