Table 5.

Results of poisson regression model for first/corresponding authors

Variables	(1)	(2)	(3)	(4)	(5)	(6)
Continued_collaboration	−0.245***	−0.388***	−0.388***	−0.376***	−0.371***	−0.366***
	(−6.50)	(−8.28)	(−8.28)	(−8.02)	(−7.89)	(−7.76)
Career_stage		−0.204***	−0.204***	−0.199***	−0.196***	−0.193***
		(−5.24)	(−5.24)	(−5.11)	(−5.03)	(−4.96)
Inherent_potential				−0.022***	−0.022***	−0.021***
				(−4.97)	(−4.86)	(−4.82)
Linguistic_distance				0.027	0.076	0.089*
				(0.68)	(1.53)	(1.77)
Geographic_distance					−0.000*	−0.000
					(−1.67)	(−1.29)
Lived_before						−0.053
						(−1.62)
Discipline	Y	Y	Y	Y	Y	Y
Constant	1.144***	1.344***	1.344***	1.406***	1.409***	1.423***
	(25.57)	(22.90)	(22.90)	(23.32)	(23.36)	(23.37)
Observations	1,697	1,697	1,697	1,697	1,697	1,697

z-statistics in parentheses

***p < 0.01, **p < 0.05, *p < 0.1