GDP calculation needs double deflation, says IMF paper

IMF paper explores GDP calculation methods

Countries that still use single deflation to calculate real GDP should move to the double deflation method, a discussion paper published by the International Monetary Fund concludes. To calculate real GDP, the System of National Accounts recommends a technique called double deflation. However, some countries use single deflation techniques, which authors Claudia Dziobek, Eric Metreau, Marco Marini, Michael Stanger and Thomas Alexander claim "fails to capture important relative price changes a