Table 3.

Results of poisson regression models

Variables	(1)	(2)	(3)	(4)	(5)	(6)
Continued_Collaboration	−0.259***	−0.330***	−0.324***	−0.324***	−0.321***	−0.318***
	(−10.12)	(−11.12)	(−10.95)	(−10.93)	(−10.82)	(−10.66)
Career_stage		−0.120***	−0.118***	−0.116***	−0.115***	−0.114***
		(−4.75)	(−4.67)	(−4.58)	(−4.52)	(−4.50)
Inherent_potential			−0.019***	−0.019***	−0.019***	−0.019***
			(−5.66)	(−5.59)	(−5.49)	(−5.44)
Linguistic_distance				−0.040	−0.003	0.012
				(−1.36)	(−0.08)	(0.33)
Geographic_distance					−0.000*	−0.000
					(−1.90)	(−1.33)
Lived_before						−0.021
						(−1.40)
Displine	Y	Y	Y	Y	Y	Y
Constant	1.268***	1.371***	1.421***	1.426***	1.429***	1.436***
	(43.99)	(38.16)	(38.52)	(38.49)	(38.55)	(38.44)
Observations	3,222	3,222	3,222	3,222	3,222	3,222

z-statistics in parentheses

***p < 0.01, **p < 0.05, *p < 0.1