Table 7.

Sample processing.

	Remove Municipalities	Tail Shrinking Treatment	Shorten Sample Interval
	(1)	(2)	(3)
	$lncb$	$lncb$	$lncb$
$ty$	−0.053 ***	−0.059 ***	−0.057 ***
	(0.008)	(0.008)	(0.008)
$lngdp$	−0.723 ***	−0.685 ***	−0.811 ***
	(0.013)	(0.013)	(0.014)
$hum$	0.073	0.490 *	0.119
	(0.136)	(0.261)	(0.129)
$urban$	−0.061 *	−0.072 **	−0.063 *
	(0.033)	(0.034)	(0.034)
$finan$	0.045 ***	0.048 ***	0.030 ***
	(0.004)	(0.005)	(0.004)
$edu$	0.865 **	1.184 ***	1.356 ***
	(0.314)	(0.349)	(0.405)
$inter$	0.020 **	0.045 ***	0.004
	(0.008)	(0.015)	(0.007)
_$cons$	19.133 ***	18.507 ***	20.632 ***
	(0.209)	(0.220)	(0.239)
Time effect	Yes	Yes	Yes
City effect	Yes	Yes	Yes
$N$	3240	3288	2466
$R-sq$	0.985	0.983	0.988

Note: Standard errors are in parentheses, and ***, **, * denote significance at the levels of 1%, 5%, and 10%, respectively.