Variable Description	Parameter Estimate	t-Statistic
Constant	1.882 (0.153)	29.937 (6.100)
Log of highway freight volumes (in ten thousands)	0.016 (0.041)	6.298 (10.575)
Log of railway freight volumes (in ten thousands)	0.005 (0.019)	2.989 (4.087)
Log of paved roads (in km²)	0.007 (0.006)	1.309 (13.774)
Log of highway passenger volume (in ten thousands)	0.017 (0.056)	4.673 (5.323)
Log of fixed asset investment (in millions of 2010$USD)	0.051 (0.029)	7.837 (5.015)
Log of urbanization rate	0.313 (0.307)	7.296 (6.516)
Log of public transportation unit per person	0.021 (0.007)	6.541 (22.617)
Log of highway congestion rate	−0.031 (0.300)	-5.870 (23.048)
Log of labor participation rate	3.110 (0.406)	18.883 (6.387)
Log of industrial sector’s contribution to gross city product	0.127 (0.016)	17.143 (18.128)
Log of service sector’s contribution to gross city product	0.362 (0.101)	9.545 (9.102)
Number of observations	3081
Log-likelihood at zero LL(0)	−4067.839
Log-likelihood at convergence LL(β)	−802.681
	0.803