Higher-order structures of local collaboration networks are associated with individual scientific productivity

EPJ Data Science

Table 4 Fixed-effects Poisson regressions regarding the association between \(\beta _{1} \) and scientific productivity

Productivity(ln)	(1)	(2)	(3)	(4)	(5)
\(\beta _{1}\)	0.600***	0.360***	0.308***	0.238***	0.111***
\(\beta _{1}\)	(0.00064)	(0.00062)	(0.00055)	(0.00052)	(0.00046)
\(\beta _{0}\)		0.090***	0.088***	0.077***	0.044***
\(\beta _{0}\)		(0.00006)	(0.00006)	(0.00006)	(0.00007)
Network density			−0.401***	−0.332***	−0.168***
Network density			(0.00059)	(0.00058)	(0.00055)
Average tie strength (log)			0.262***	0.103***	0.065***
Average tie strength (log)			(0.00023)	(0.00033)	(0.00025)
Collaborative strength			0.166***	0.207***	0.284***
Collaborative strength			(0.00068)	(0.00068)	(0.00074)
Career age (log)				−0.002***	−0.023***
Career age (log)				(0.00014)	(0.00031)
\(\text{Productivity}_{\overleftarrow{t}}\)(log)				0.233***	0.022***
\(\text{Productivity}_{\overleftarrow{t}}\)(log)				(0.00034)	(0.00019)
Year fixed effects	N	N	N	N	Y
Individual fixed effects	N	N	N	N	Y
Network size effects	N	N	N	N	Y
Log pseudolikelihood	−48,324,649	−44,638,277	−43,575,288	−37,461,268	−34,164,091
R²	0.0154	0.0905	0.1122	0.1401	0.2158
Observations	27,786,774	27,786,774	27,786,774	24,000,967	24,000,967
Individuals	3,785,807	3,785,807	3,785,807	3,785,807	3,785,807

Notes: Robust standard errors in parentheses; *** p-value < 0.001, ** p-value < 0.01, * p-value < 0.05; 3,785,807 observations dropped when we control for \(\text{Productivity}_{\overleftarrow{t}}\).