	(1)	(2)	(3)	(4)
	tichu11	tichu12	tichu13	tichu14
VARIABLES	lnexport	lnexport	lnexport	lnexport
				
treat_year03	0.1560***	0.1628***	0.1296**	0.1112*
	(0.0524)	(0.0527)	(0.0520)	(0.0641)
lnage	0.2004***	0.2018***	0.1978***	0.1387***
	(0.0301)	(0.0302)	(0.0320)	(0.0297)
lnsize	0.5367***	0.5374***	0.5452***	0.5103***
	(0.0249)	(0.0249)	(0.0253)	(0.0344)
lnlabor	0.1550***	0.1547***	0.1634***	0.1635***
	(0.0139)	(0.0140)	(0.0142)	(0.0182)
profit	0.8640***	0.8644***	0.8605***	0.7942***
	(0.0625)	(0.0625)	(0.0630)	(0.0833)
lngdp	0.0007	0.0023	0.0235	0.0166
	(0.0184)	(0.0188)	(0.0197)	(0.0236)
openness	-0.0044	-0.0100	0.0234	0.0047
	(0.0395)	(0.0402)	(0.0413)	(0.0868)
lnpeople	-0.0120	-0.0128	-0.0460	-0.2504
	(0.0379)	(0.0383)	(0.0393)	(0.1685)
lnrailway	0.0821	0.0776	0.0413	0.0789
	(0.0757)	(0.0764)	(0.0874)	(0.1660)
lnhighway	-0.1672*	-0.1651*	-0.2143**	-0.5405***
	(0.0969)	(0.0985)	(0.1015)	(0.1870)
Constant	8.0731***	8.0698***	8.8084***	14.2678***
	(1.1126)	(1.1323)	(1.1856)	(2.2927)
				
Observations	128,742	127,837	121,805	84,688
R-squared	0.813	0.813	0.815	0.814
Robust standard errors in parentheses				
*** p<0.01, ** p<0.05, * p<0.1				
