Publication Details

This article was originally published as Valadkhani, A., Layton, A.P., Quantifying the Effect of GST on Inflation in Australia's Capital Cities: An Intervention Analysis, Australian Economic Review, 37(2), 2004, 125-38. Original article available at www.blackwell-synergy.com


This paper examines the magnitude and duration of the GST effect on inflation in Australia’s eight capital cities using the Box and Tiao intervention analysis and quarterly data spanning from 1948:4 to 2003:1. We found that GST had a significant but transitory impact on inflation only in the September quarter of 2000 when this new tax system was implemented. In this quarter inflation showed an additional increase of 2.6 per cent in Sydney (minimum effect) and 2.8 per cent in Australia as a whole, the same figure for Hobart was 3.3 per cent (maximum effect). Based on the Wald test results, we have also found some evidence that there is no significant (or substantial) difference in the average price changes among capital cities. We could not reject the null hypothesis that GST increased the CPI by 2.8 per cent across the board in various cities. These results are also consistent with previous studies/surveys. Keywords: Intervention Analysis; State and Local Taxation; Australia.



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