The Consumer Prices Index (CPI) is the preferred measure of inflation used in the application of monetary policy by the Bank of England. Within the System of National Accounts, and subsequently the ESA, the preferred measure of inflation is the Implied Price Deflator (IPD). Historically, the indices have behaved broadly similar, however since around 2007 Q4 the divergence in the indices has increased and become more volatile. The plan for this article is to cover the conceptual and scope differences between the CPI and Household Final Consumption Expenditure Implied Price Deflator. There will be an empirical analysis on how and why the two indices differ over time.
Source agency: Office for National Statistics
Designation: National Statistics
Alternative title: The differences between the CPI and the Implied Price Deflator