变量	Tobit	Tobit	随机效应	随机效应
变量	非国有企业(1)	国有企业(2)	非国有企业(3)	国有企业(4)
power	−0.906^**	−1.169^*	−0.047^*	−0.044
power	(−2.541)	(−1.690)	(−1.950)	(−1.618)
first	−0.997^**	−0.830	−0.022	−0.017
first	(−2.447)	(−1.283)	(−0.647)	(−0.517)
age	−0.207	−0.853	−0.011	−0.050
age	(−0.628)	(−1.007)	(−0.285)	(−1.056)
pattern	−0.269	−1.843	−0.030	−0.089
pattern	(−0.139)	(−0.704)	(−0.272)	(−0.937)
xjldx	−0.102	2.768^**	−0.008	0.060
xjldx	(−0.497)	(2.060)	(−0.593)	(1.386)
asset	−1.242^***	−1.696^**	−0.116^***	−0.054^*
asset	(−3.286)	(−2.572)	(−3.801)	(−1.847)
profit	−0.363	0.500	−0.040^**	0.002
profit	(−1.200)	(0.635)	(−2.087)	(0.060)
constant	−5.393^***	−8.580^**	0.283^***	0.215^*
constant	(−2.820)	(−2.293)	(2.700)	(1.770)
Year	Yes	Yes	Yes	Yes
N	2429	1753	2429	1753
df_m	12.000	12.000	12.000	12.000
F	2.749	1.506
R²			0.041	0.056