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Revealing Energy Expenditure Determinants by the Trivariate Heckman Sample Selection Model
In Turkey, the most preferred type of transportation in passenger and freight transportation is road transportation and as of 2017, 80,6% of domestic passenger transportation and 89,8% of freight transporta-tion were performed via highways. In parallel with the increase in economic development and welfare in the country, private car own-ership and traffic volume on the roads have increased tremendously. As of 2018 the number of registered motor vehicles increased by approximately 149% in the last 15 years and reached approximately 23 million. The transport sector largely depends on petroleum prod-ucts, the oil production in the country corresponds to only 7-9% of consumption and the remaining 91-93% is met by imports. In this study, the data obtained from the household budget survey applied to 12166 households throughout the country covering the year 2017 by the Turkish Statistical Institute (TSI) were used. The responses of households to changing diesel, gasoline and LPG prices were tried to be determined by spending items by using dependent trivariate Heckman sample selection model. Therefore, if households’ reactions to price changes can be identified, this information is expected to shed light on the country both in times of crisis/uncertainty and for sustainable transportation policy

Households, Heckman Sample, Energy Expenditures, Selection Mod-el, Transportation

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