One drawback is that for about half the basket, we only have 18 months of data.
"So [for] the seasonal patterns, the usual period of time that we use for seasonal adjustment is three years, so we will be doing seasonal adjustment on some part of the basket with less than the ideal amount of information.
hanrahan in ausfinance
New monthly inflation data shows jump from 3.6pc in September to 3.8pc in October - ABC News
https://www.abc.net.au/news/2025-11-26/inflation-3-8pc-october-2025-australia-bureau-of-statistics/106054014Why do we need this ?