RPI - measure of inflation that is used for adjusting pensions and other benefits to take account of changes in inflation and frequently used in wage negotiations. Differs from CPI in methodology and coverage.
CPI and RPI are calculated using the same underlying price data
RPI, unlike CPI, includes all housing costs including mortgage interest payments, council tax, road fund licence, TV licence.
CPI, unlike RPI, includes uni accomodation fees, foreign student uni tuition fees and stockbrokers' charges.
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