An Exploration of Australian Petrol Demand: Unobservable Habits, Irreversibility and Some Updated Estimates

Robert Vincent Breunig () and Carol Gisz

The Economic Record, 2009, vol. 85, issue 268, pages 73-91

Abstract: We explore a methodological improvement to the standard dynamic demand model for petrol - a general model which allows for slowly evolving, unobservable habits. If this habit formation model is correct, then standard estimation techniques produce inconsistent estimates. We find price elasticities of -0.13 (short-run) and -0.20 (long-run). Importantly, standard techniques are misleading about the precision of elasticity estimates and the confidence interval around the long-run price elasticity is quite wide. We test for price irreversibility and find, in contrast to the USA, almost no evidence that petrol responds differently to price increases and decreases. Copyright © 2009 The Economic Society of Australia.

Date: 2009

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