表3 学业表现的同群效应

	Dependent variable:
	社交网络主体学生学业表现：Score
	(1)	(2)	(3)
GP_Score	0.387***	0.298***	0.304***
	(0.024)	(0.024)	(0.025)
Rank		-0.353***	-0.353***
		(0.035)	(0.035)
Birth		0.006***	0.006***
		(0.002)	(0.002)
Gender		-0.029***	-0.028***
		(0.002)	(0.002)
East		0.016***	0.016***
		(0.002)	(0.002)
Middle		0.012***	0.013***
		(0.002)	(0.002)
Northeast		0.008**	0.008**
		(0.003)	(0.003)
Edu		0.0003	0.0003
		(0.002)	(0.002)
Constant	1.415***	1.627***	1.613***
	(0.056)	(0.056)	(0.059)
控制朋友特征变量	NO	NO	YES
固定效应	NO	YES	YES
Observations	6,160	6,160	6,160
R2	0.040	0.115	0.115
Note:	*p<0.1; **p<0.05; ***p<0.01