Table 2. Coefficients obtained for the outflow of internal migration in the US.

Outflow of migration (move to…)	$\widehat{\beta }$	s.e.	$\widehat{\text{log}\alpha }$	s.e.	Adj. R2
Migrating (leaving the city)	0.8829	0.0147	-1.7863	0.1867	0.9033
The countryside	0.6846	0.0273	-0.7214	0.3464	0.6199
City with less than 200,000 inhabitants	0.8060	0.0263	-2.8555	0.3325	0.7101
City with less than 300,000 inhabitants	0.8199	0.0232	-2.6039	0.2949	0.7636
City with less than 400,000 inhabitants	0.8171	0.0222	-2.285	0.2811	0.7794
City with less than 500,000 inhabitants	0.8224	0.0206	-2.1614	0.2607	0.8061
City with less than 1,000,000 inhabitants	0.8363	0.0175	-1.9163	0.2224	0.8554
City with less than 3,000,000 inhabitants	0.8609	0.0159	-1.8352	0.2021	0.8863
City with less than 5,000,000 inhabitants	0.8689	0.0157	-1.8189	0.1999	0.8877
City with more than 1,000,000 inhabitants	0.9570	0.0211	-3.4759	0.2674	0.8426
City with more than 3,000,000 inhabitants	1.0073	0.0307	-4.8421	0.3891	0.7369
City with more than 5,000,000 inhabitants	1.0499	0.0337	-5.8437	0.4271	0.7163
City with more than 8,000,000 inhabitants	1.1688	0.0506	-8.5108	0.6408	0.5814
City with more than 10,000,000 inhabitants	1.2984	0.0619	-10.6921	0.7855	0.5327