Table 1. Results of the multiple linear regression for all projects with the coreness values derived from the co-change networks using the eigenvector centrality. The values represent the estimates for each factor and a * means that the result is statistically significant with a significance level of 5%. Also we present the standardized beta coefficient of the factors in the linear regression model and a Spearman correlation coefficient between the factors and the coreness of developers.

		Linear Regression				Beta Coefficients			Spearman Correlation
Project	Active Time	Number of Contributions	Gender	R-Squared	Active Time	Number of Contributions	Gender	Active Time	Number of Contributions	Gender
Angular	0.005	0.997*	0.033*	0.499	0.008	0.702	0.055	0.506*	0.716*	0.027
Atom	0.200*	1.281*	-0.008	0.547	0.161	0.691	-0.008	0.368*	0.648*	0.035
Bootstrap	0.547*	1.497*	0.006	0.698	0.349	0.663	0.004	0.619*	0.640*	-0.121*
Cookiecutter	-0.094	1.312*	0.094	0.314	-0.088	0.561	0.064	0.089	0.514*	0.003
dbatools	-0.015	0.542*	0.002	0.283	-0.040	0.538	0.006	0.362*	0.614*	0.069
Deno	0.109*	1.397*	0.004	0.822	0.149	0.835	0.007	0.578*	0.683*	0.058
Electron	0.270*	1.316*	0.047*	0.656	0.244	0.712	0.063	0.570*	0.702*	0.021
Ghost	0.055*	1.087*	-0.015	0.498	0.079	0.700	-0.025	0.312*	0.729*	0.187*
Keras	0.179*	1.441*	0.026*	0.697	0.169	0.750	0.056	0.535*	0.499*	0.057*
Moby	0.088*	1.527*	-0.006	0.567	0.105	0.725	-0.012	0.474*	0.658*	0.010
Next.js	0.003	1.147*	0.000	0.821	0.004	0.905	0.000	0.334*	0.337*	0.024
Nextcloud	0.009	0.392*	0.004	0.156	0.018	0.389	0.006	0.192*	0.280*	-0.049
React	0.040*	2.022*	0.000	0.542	0.068	0.721	0.000	0.280*	0.565*	0.050*
Redux	0.492*	1.734*	-0.040	0.330	0.319	0.446	-0.024	0.354*	0.433*	-0.023
Reveal.js	0.868*	1.115*	-0.020	0.764	0.538	0.457	-0.013	0.463*	0.537*	-0.047
TensorFlow	-0.012*	1.245*	-0.001	0.797	-0.035	0.898	-0.004	0.431*	0.741*	0.051*
Three.js	0.090*	1.645*	0.007	0.712	0.110	0.798	0.009	0.312*	0.458*	0.025
TypeScript	0.126*	1.287*	-0.032*	0.656	0.139	0.753	-0.043	0.570*	0.723*	0.080*
VS Code	-0.042*	0.635*	-0.003	0.517	-0.087	0.758	-0.008	0.546*	0.642*	-0.001
Vue	0.217*	1.761*	0.003	0.620	0.211	0.734	0.003	0.328*	0.510*	-0.054

Table 2. Results of the multiple linear regression for all projects with the coreness values derived from the co-change networks using the hierarchy centrality. The values represent the estimates for each factor and a * means that the result is statistically significant with a significance level of 5%. Also we present the standardized beta coefficient of the factors in the linear regression model and a Spearman correlation coefficient between the factors and the coreness of developers.

		Linear Regression				Beta Coefficients			Spearman Correlation
Project	Active Time	Number of Contributions	Gender	R-Squared	Active Time	Number of Contributions	Gender	Active Time	Number of Contributions	Gender
Angular	-0.014	0.812*	0.032*	0.399	-0.022	0.638	0.058	0.436*	0.785*	0.029
Atom	0.154*	1.127*	-0.016	0.464	0.129	0.644	-0.018	0.378*	0.769*	0.031
Bootstrap	0.337*	1.482*	0.012	0.638	0.229	0.700	0.008	0.457*	0.709*	-0.114*
Cookiecutter	-0.140*	1.216*	0.197*	0.355	-0.140	0.581	0.143	-0.009	0.570*	0.100
dbatools	-0.032*	0.488*	-0.015	0.230	-0.084	0.487	-0.049	0.241*	0.641*	0.041
Deno	-0.006	1.248*	-0.021	0.688	-0.010	0.834	-0.037	0.412*	0.773*	0.048
Electron	0.167*	1.269*	0.029*	0.590	0.160	0.711	0.041	0.497*	0.778*	0.050
Ghost	0.014	0.980*	-0.010	0.461	0.022	0.680	-0.017	0.300*	0.815*	0.227*
Keras	0.143*	1.379*	0.039*	0.711	0.143	0.758	0.089	0.262*	0.528*	0.051
Moby	0.056*	1.126*	-0.008	0.411	0.077	0.621	-0.017	0.375*	0.720*	0.038*
Next.js	-0.032*	1.042*	0.001	0.771	-0.044	0.888	0.002	0.221*	0.431*	-0.003
Nextcloud	0.027	0.628*	0.007	0.336	0.049	0.560	0.009	0.468*	0.693*	-0.062
React	0.013	1.813*	-0.009	0.486	0.023	0.692	-0.013	0.385*	0.647*	0.053*
Redux	0.521*	1.665*	-0.010	0.330	0.313	0.457	-0.007	0.224*	0.453*	0.015
Reveal.js	0.965*	1.058*	-0.011	0.822	0.565	0.449	-0.007	0.271*	0.561*	-0.103
TensorFlow	-0.025*	1.078*	-0.003	0.524	-0.069	0.732	-0.013	0.358*	0.852*	0.083*
Three.js	0.090*	1.633*	0.007	0.695	0.109	0.788	0.009	0.244*	0.579*	-0.013
TypeScript	0.057*	0.828*	-0.033*	0.448	0.083	0.638	-0.059	0.500*	0.781*	0.094*
VS Code	-0.064*	0.636*	-0.004	0.488	-0.130	0.754	-0.008	0.410*	0.737*	-0.030
Vue	0.422*	1.697*	0.010	0.659	0.294	0.706	0.011	0.226*	0.547*	-0.020

Table 3. Results of the multiple linear regression for all projects with the coreness values derived from the issue networks using the eigenvector centrality. The values represent the estimates for each factor and a * means that the result is statistically significant with a significance level of 5%. Also we present the standardized beta coefficient of the factors in the linear regression model and a Spearman correlation coefficient between the factors and the coreness of developers.

		Linear Regression				Beta Coefficients			Spearman Correlation
Project	Active Time	Number of Contributions	Gender	R-Squared	Active Time	Number of Contributions	Gender	Active Time	Number of Contributions	Gender
Angular	0.006*	1.283*	0.004*	0.460	0.029	0.672	0.021	0.154*	0.515*	0.007
Atom	0.011*	0.727*	0.000	0.188	0.040	0.427	-0.002	0.131*	0.381*	-0.009
Bootstrap	0.004*	0.957*	0.000	0.632	0.020	0.793	0.001	0.176*	0.432*	-0.013*
Cookiecutter	0.007	1.230*	-0.004	0.468	0.020	0.683	-0.009	0.419*	0.399*	0.059*
dbatools	-0.002	0.696*	0.014*	0.386	-0.010	0.618	0.058	0.159*	0.585*	0.060*
Deno	-0.011*	1.028*	-0.004*	0.744	-0.041	0.871	-0.019	0.180*	0.638*	-0.034*
Electron	0.001	0.944*	-0.002*	0.518	0.004	0.720	-0.016	0.142*	0.484*	0.013*
Ghost	0.005*	1.218*	0.017*	0.413	0.026	0.623	0.082	0.496*	0.432*	0.032*
Keras	0.007*	1.044*	0.001*	0.495	0.028	0.700	0.011	0.160*	0.429*	-0.020*
Moby	0.005*	1.124*	-0.001	0.518	0.027	0.717	-0.005	0.169*	0.513*	0.009*
Next.js	-0.002*	0.984*	0.000	0.643	-0.014	0.803	0.000	0.172*	0.498*	-0.023*
Nextcloud	0.002*	1.539*	-0.001	0.568	0.011	0.752	-0.007	0.263*	0.588*	0.032*
React	0.001*	1.521*	-0.003*	0.669	0.007	0.817	-0.016	0.316*	0.458*	-0.003
Redux	0.080*	1.882*	0.001	0.420	0.142	0.611	0.003	0.173*	0.394*	-0.024*
Reveal.js	0.088*	1.019*	-0.001	0.343	0.122	0.550	-0.002	0.141*	0.269*	-0.013
TensorFlow	0.004*	0.083*	0.000	0.007	0.038	0.070	-0.004	0.194*	0.454*	-0.004
Three.js	0.001	1.211*	0.001	0.688	0.003	0.829	0.004	0.199*	0.557*	-0.038*
TypeScript	0.009*	1.400*	0.001*	0.124	0.057	0.343	0.010	0.172*	0.492*	-0.005
VS Code	-0.001*	1.070*	0.000	0.510	-0.017	0.716	-0.002	0.157*	0.409*	0.003
Vue	0.008*	0.597*	-0.001	0.251	0.037	0.495	-0.004	0.069*	0.344*	0.005

Table 4. Results of the multiple linear regression for all projects with the coreness values derived from the issue networks using the hierarchy centrality. The values represent the estimates for each factor and a * means that the result is statistically significant with a significance level of 5%. Also we present the standardized beta coefficient of the factors in the linear regression model and a Spearman correlation coefficient between the factors and the coreness of developers.

		Linear Regression				Beta Coefficients			Spearman Correlation
Project	Active Time	Number of Contributions	Gender	R-Squared	Active Time	Number of Contributions	Gender	Active Time	Number of Contributions	Gender
Angular	0.003*	0.824*	0.006*	0.266	0.015	0.510	0.038	0.113*	0.524*	-0.001
Atom	0.012*	0.707*	-0.001	0.152	0.037	0.385	-0.004	0.141*	0.418*	-0.031*
Bootstrap	0.002*	0.712*	0.000	0.353	0.013	0.593	0.004	0.131*	0.471*	-0.009*
Cookiecutter	-0.004	1.063*	-0.006	0.352	-0.010	0.594	-0.013	0.275*	0.512*	0.031
dbatools	-0.007*	0.326*	0.012*	0.163	-0.042	0.399	0.072	0.147*	0.602*	0.039
Deno	-0.015*	0.945*	-0.006*	0.663	-0.058	0.825	-0.030	0.142*	0.591*	-0.030*
Electron	-0.004*	0.683*	-0.003*	0.340	-0.018	0.586	-0.020	0.145*	0.513*	0.006
Ghost	0.001	0.999*	0.015*	0.316	0.005	0.544	0.078	0.309*	0.533*	0.055*
Keras	0.006*	0.879*	0.002*	0.345	0.023	0.583	0.017	0.135*	0.481*	-0.010
Moby	0.001*	0.754*	-0.001	0.292	0.007	0.540	-0.005	0.125*	0.524*	-0.001
Next.js	-0.002*	0.766*	0.000	0.406	-0.011	0.638	0.000	0.117*	0.503*	-0.023*
Nextcloud	-0.001	1.200*	-0.001	0.434	-0.004	0.660	-0.007	0.253*	0.586*	0.027*
React	-0.001	1.152*	-0.003*	0.432	-0.008	0.658	-0.020	0.236*	0.499*	-0.015*
Redux	0.051*	1.451*	0.001	0.281	0.098	0.506	0.003	0.180*	0.430*	-0.039*
Reveal.js	0.103*	0.926*	0.000	0.317	0.148	0.516	-0.001	0.202*	0.377*	-0.020
TensorFlow	0.003*	0.043*	0.000	0.003	0.034	0.037	-0.003	0.172*	0.524*	-0.001
Three.js	-0.001	1.036*	0.002*	0.650	-0.003	0.807	0.010	0.210*	0.588*	-0.047*
TypeScript	0.005*	1.089*	0.002*	0.082	0.033	0.282	0.015	0.180*	0.534*	-0.007
VS Code	-0.002*	0.878*	0.000	0.362	-0.024	0.604	-0.002	0.133*	0.422*	-0.004
Vue	0.007*	0.543*	-0.001	0.207	0.034	0.449	-0.005	0.120*	0.440*	-0.027*