变量	列(1)	列(2)	列(3)
	Roe	Roe	Roe
Dtii		0.3724^***	0.3255^***
Dtii		(0.1300)	(0.1304)
R&D			0.0158^***
R&D			(0.1654)
interact			0.2135^***
interact			(0.0741)
Size	0.0352^***	0.0343^***	0.0364^***
Size	(0.0043)	(0.0043)	(0.0043)
Age	0.0062	0.0051	0.0000
Age	(0.0004)	(0.0004)	(0.0004)
Atr	0.0142^***	0.0163^***	0.0184^***
Atr	(0.0014)	(0.0014)	(0.0014)
Itr	−0.0001^*	−0.0006^*	−0.0002^*
Itr	(0.0061)	(0.0061)	(0.0061)
Lhr	0.0051	0.0047	0.0050
Lhr	(0.0009)	(0.0009)	(0.0009)
HhI	−0.0125	−0.0129	−0.0093
HhI	(0.0108)	(0.0108)	(0.0108)
_cons	0.0586^**	0.0580^*	0.0516^*
_cons	(0.0297)	(0.0301)	(0.0300)
year	control	control	control
Observations	1035	1035	1035
R-squared	0.1313	0.1339	0.1432