within a country or region. Leaving supply-side aspects aside such as available airport infrastructure or
regulatory constraints, the analysis focused so far on demand-side issues such as available income, age structure,
or level of education. The question to be addressed with the empirical analysis is whether the outlined factors
have a statistically significant influence on passenger demand in the EU28 and EFTA countries. A high share of
Air Transport Research Society World Conference 2017
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the studies outlined in Section I finds that the income per capita or household, often expressed
by using gross
domestic product per capita, is one of the main factors determining the amount of air trips conducted per person.
Therefore, this result is expected to be reflected in the European air transport data as well. This factor, as well as
others discussed in the previous sections, is included in a regression analysis to determine their respective
influence on the number of air trips per capita in Europe. Table 1 gives an overview of these factors.
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