	(1)	(2)	(3)
	shuiwei1	shuiwei2	shuiwei3
VARIABLES	lnexport	lnexport	lnexport
			
shuiweiceshi1	0.0603**	0.0616**	0.0553*
	(0.0291)	(0.0274)	(0.0286)
lnage		0.1982***	0.2016***
		(0.0300)	(0.0312)
lnsize		0.5373***	0.5432***
		(0.0249)	(0.0251)
lnlabor		0.1554***	0.1643***
		(0.0139)	(0.0147)
profit		0.8652***	0.8451***
		(0.0625)	(0.0666)
lngdp		0.0013	0.0013
		(0.0184)	(0.0191)
openness		-0.0136	-0.1581*
		(0.0399)	(0.0929)
lnpeople		-0.0122	-0.0105
		(0.0380)	(0.0397)
lnrailway		0.1275*	0.1382*
		(0.0725)	(0.0744)
lnhighway		-0.1386	-0.1228
		(0.1006)	(0.1047)
Constant	13.9316***	7.3630***	7.1310***
	(0.0646)	(1.1579)	(1.1825)
			
Observations	159,200	128,742	119,894
R-squared	0.799	0.813	0.813
Robust standard errors in parentheses			
*** p<0.01, ** p<0.05, * p<0.1			
