An Empirical Study on Downstream Dependency Package Groups in Software Packaging Ecosystems

Table 9

Spearman correlation coefficients for features of downstream dependency packages and the development of the focal package in CDDGs (top 20% members).

	Features of downstream dependency packages and size of CDDG (correlation coefficient (p-value))			Features of downstream dependency packages and number of releases of focal package (correlation coefficient (p-value))
Features	Cargo	CPAN	RubyGems	Cargo	CPAN	RubyGems
Average age	0.14 (0.06)	0.60 (1.01e-18)	0.41 (1.26e-14)	0.25 (0.00)	0.26 (0.00)	0.01 (0.83)
Average number of stars	0.18 (0.01)	0.65 (3.61e-23)	0.56 (1.45e-28)	0.09 (0.20)	0.39 (5.03e-08)	0.18 (0.00)
Average number of forks	0.13 (0.07)	0.67 (1.79e-24)	0.52 (2.95e-24)	0.05 (0.50)	0.38 (1.49e-07)	0.21 (0.00)
Average rank	0.18 (0.01)	0.65 (4.64e-23)	0.58 (1.93e-30)	0.02 (0.77)	0.25 (9.55e-12)	0.10 (0.08)
Average number of keywords	0.14 (0.06)	0.27 (0.00)	0.26 (2.89e-06)	0.16 (0.03)	0.07 (0.33)	0.16 (0.00)
Average number of dependency repositories	0.29 (7.23e-05)	0.60 (1.08e-18)	0.59 (3.45e-32)	0.05 (0.51)	0.22 (0.00)	0.13 (0.02)
Average number of releases	0.13 (0.08)	0.38 (2.49e-07)	0.38 (4.63e-13)	0.23 (0.00)	0.34 (4.48e-06)	0.25 (4.76e-06)
Average number of dependency packages	0.33 (4.43e-06)	0.56 (2.29e-16)	0.59 (1.79e-32)	0.01 (0.86)	0.20 (5.50e-08)	0.12 (0.03)

The correlation coefficient is not less than 0.20, highlighting a higher correlation using bold font.