Air Transport Research Society World Conference 2017
12
Air trips per capita show a high divergence across these countries with Romania
having the lowest number
of trips per capita (0.02) and Cyprus the highest (1.35). The gross domestic product per capita ranges from a
minimum of USD 17 207 (~16 000 EUR) in Bulgaria to USD 98 459 (~90 000 EUR) in Luxembourg and the
share of citizens with tertiary education is highest in the United Kingdom (~37 per cent) as well as Luxembourg
(~40 per cent) and lowest in Romania with 14 per cent. The degree of urbanisation also differs strongly with
about 98 per cent in Belgium and 14 per cent in Liechtenstein. Including these variables, the specification of the
model is as follows:
airtripscap =
β
0
+ β
1
GDP + β
2
geo + β
3
educ + β
4
urbanpop + ε
(1)
The results of the regression analysis applying a linear-log OSL model are summarised in Table 4.
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