Impact of price indexes and GDP index on trends inthe use of domestic air transport in Vietnam

This study aims to determine the impact of price indexes and Gross Domestic Product (GDP) index on trends in the use of domestic air transport in Vietnam. From the theoretical base, the article has developed a model of research and analysis the data of these elements over a 15-year period from 2002 to 2016. Research results show that the GDP index and transport price index of alternative modes have a positive impact on the trend of using domestic air transport service in Vietnam, but price index of air transport has a negative impact. In particular, the level of its impact in air cargo transport is quite low due to the proportion of air cargo transport in cargo transport modes is still low. While domestic passenger transport is strongly influenced by the air passenger transport price index and the passenger transport price index of alternative modes of transport due to the proportion of passenger in modes of transport is quite high. However the impact of GDP index is relatively low. These findings are an important basis for planning transport policy in Vietnam through transport pricing policies.