Inflation

Debate between Lord Turnbull and Lord Reid of Cardowan

Monday 1st July 2019 Lords Chamber

[Lord Turnbull]

The basis on which that was done was that the statistics authority said it was flawed; that, I thought, was sufficient. Anyway, it said it would go on publishing the RPI and no longer designate it as a “national statistic” but rather, treat it as a legacy measure, with no further work to develop it. The chief statistician said there were many flaws with the RPI. For example, if it is used in the Carli index, which is a very simple test, if something goes up by 25% and then down by 25%, it does not end up where it started—the so-called time reversibility test. It said that it was not worth changing the treatment of clothing if it was not going to look at all the other issues.

This policy of spartan neglect proved controversial, provoking the inquiry by the EAC. Our conclusion was that RPI was deeply embedded in many aspects of economic life—on this we agreed with the noble Lord, Lord Lea—and it was wrong of the statistics authority and the ONS to just walk away from it. Indeed, it was argued that the statistics authority had a statutory duty—

[Lord Reid of Cardowan (Lab)]

Will the noble Lord explain something to me? I do not understand his contention that one of the main reasons why RPI is discredited is that if something goes up by 25% and then comes down by 25%, it does not end up where it started. If any figure goes up by 25% and is then reduced by 25%, it does not end up where it started.

[Lord Turnbull]

I think the noble Lord should go away and write this down on a piece of paper—I think he will find that it does not end up where it started.