Accounting for Housing in a CPI

Statistical agencies in different nations usually use the rental equivalence approach to the treatment of housing in their CPIs but a few countries use the user cost approach. The paper argues that an opportunity cost approach is the correct theoretical framework for accounting for OOH in a CPI. This approach, first mentioned in a 2006 OECD paper by Diewert, is developed more fully here. We explore the relationship of this new approach to the usual rental equivalency and user cost approaches. The new approach leads to an Owner Occupied Housing Opportunity Cost (OOHOC) index that is a weighted average of the rental and the financial opportunity costs.