Table 3.

Travel frequency.

Variables	NegBin Model 1		NegBin Model 2
	Coeff.	t	Coeff.	t	Marginal effects
Promoting factors
Political trust	0.0411	1.39
Interactional trust	0.0211	0.56
Destination trust	0.0225	0.52
Extended theory of planned behavior factors
Travel attitude	0.0864b	2.25	0.1221a	3.51	1.1298
Behavioral control	0.0602	1.50
Subjective norm	0.0600c	1.84	0.0880a	3.02	1.0920
Perceived health risk	−0.0825b	−2.15	−0.1132a	−3.60	0.8929
Past (domestic) travel experience	0.5235a	4.97	0.5143a	5.07	1.6724
Past (international) travel experience	0.0825	1.59
Restricting factors
Intrapersonal constraint	−0.0553	−1.46
Interpersonal constraint	−0.0093	−0.31
Social distancing	−0.0651b	−2.15	−0.0778a	−2.66	0.9251
Control variables
Gender	−0.0527	−1.04
Age	−0.0069a	−3.44	−0.0058a	−3.09	0.9942
Bachelor	−0.0722	−1.01
Master	0.0517	0.54
Doctorate	0.2267	1.51
Income 3+Income 4	0.1633b	2.35	0.1815a	2.64	1.1991
Income 5+Income 6	0.1726b	2.34	0.2138a	2.99	1.2384
Copula Past (domestic) travel experience	−0.0306	−0.90
Copula Past (international) travel experience	1.0398	1.19
Constant	0.9360a	3.20	1.0809a	4.08
α (dispersion parameter)	−0.8930	−14.71	−0.8654	−14.39
LR statistic	1784.4		1761.2

a = prob<1%; b = prob<5%; c = prob<10%.