Claims Inflation – a known unknown

May 14, 2013
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[This article was first published on mages' blog, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)
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Over the last year I worked with two colleagues of mine on the subject of inflation and claims inflation in particular. I didn’t expect it to be such a challenging topic, but we ended up with more questions than answers. The key question and biggest challenge is to define what inflation, or indeed claims inflation actually is and how to measure it. We published a summary of our thoughts and findings in this month’s issue of The Actuary.

Last year’s discussion about the differences between the retail price index (RPI) and consumer price index (CPI) in the UK only exemplified the challenge. The economist Tim Harford illustrated the differences between the RPI and CPI with a simple example of price changes for a shirt and blouse in his Radio 4 programme More or Less. The radio podcast is still available from the BBC. Start listening after about 18 minutes into the show.

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