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Estimating price movements from scanner data

Frances Krsinich
Statistics New Zealand
info@stats.govt.nz

Abstract

In the New Zealand Consumers Price Index (CPI), price movements for supermarket products are currently estimated from prices collected in-store, for a sample of products
priced once a month. The value and quantities of all products sold are available from the scanner data collected by supermarkets through checkouts. This data can also be used to estimate price movements. However, the features of scanner data mean that traditional index number formulae are inadequate, and new methods are required. We present the results of applying these new methods to Australian and US supermarket scanner data and New Zealand consumer electronics data.

pdf icon.  Estimating price movements from scanner data (PDF, 404kb)

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