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An Almost Ideal Demand System Model of Household Vehicle Fuel Expenditure Allocation in the United States

Abstract:
In this study I model vehicle-fuel expenditure allocation in multi-vehicle households based on the Almost Ideal Demand System (AIDS).Using data from surveys conducted by the Energy Information Administration in 1988, 1991 and 1994, I estimate the AIDS model, augmented with a comprehensive set of household and vehicle characteristics for households owning 1 to 4 vehicles ordered by vehicle age. Results show that vehicle characteristics are the most significant factors in the expenditure allocation process. Mean and standard deviation of price, expenditure and Allen substitution elasticities are calculated across households. Own-price elasticities for all vehicles are close to 1. Allen substitution elasticities indicate that all vehicle pairs are substitutes, and only vehicle 1 is found to be expenditure inelastic. The approach taken in this study enables a disentangling of vehicle allocation/substitution effects from aggregate household vehicle use behavior. This will be useful in the analysis of efficiency and distributional effects of policies affecting household transportation.

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Energy Specializations: Petroleum – Markets and Prices for Crude Oil and Products; Petroleum – Policy and Regulation; Energy Efficiency

JEL Codes: Q41: Energy: Demand and Supply; Prices, Q40: Energy: General, R41: Transportation: Demand, Supply, and Congestion; Travel Time; Safety and Accidents; Transportation Noise, R48: Transportation Economics: Government Pricing and Policy, D12: Consumer Economics: Empirical Analysis, C51: Model Construction and Estimation

Keywords: Almost Ideal Demand System (AIDS), Energy Policy, Vehicle use, CAFÉ

DOI: 10.5547/ISSN0195-6574-EJ-Vol24-No1-1

Published in Volume 24, Number 1 of the bi-monthly journal of the IAEE's Energy Economics Education Foundation.

 

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