变量	回归1	回归2	回归3
Ne_Med	0.000391^**	0.000395^**	0.000106
Ne_Med	(0.000171)	(0.000172)	(0.000176)
Lev		−0.000058	−0.000039
Lev		(0.000319)	(0.000318)
ROE		0.000414	0.000456
ROE		(0.000284)	(0.000283)
Growth		−0.000017	−0.000015
Growth		(0.000027)	(0.000027)
year			0.001***
year			(7.37)
_cons	0.012000^***	0.012100^***	0.009000^***
_cons	(0.000690)	(0.000693)	(0.000805)
N	6952	6952	6952
R²	0.001	0.001	0.009