Table 3. Results of ordered probit model

Attribute		Estimated	t-statistic
c0	Constant	1.9251	17.4783***
x1	Flight distance(km)	0.0016	14.6872***
x2	Shape	0.1573	4.8105***
x3	Autonomous	0.0599	1.8323*
x4	Roadable	0.3649	11.1143***
x5	Max.speed(km/h)	0.0017	5.0922***
x6	Noise	0.1558	4.7567***
x7	Price(10,000won)	-0.0001	-24.2499***
Observations		3,904
Likelihood ratio		935.63*** (p-value : 0.000)
Goodness of fit		0.2182 (max rescaled R2)

주: 1% significance level,
5% significance level,
10% significance level.