The goal of this paper is to theoretically and empirically demonstrate the consequences of different imputation methods, using recent data from the International Price Program. We suppose that prices are missing due to random or erratic reporting. We consider three different imputation methods:...

In some countries a Paasche price index based on unit values is compiled as a proxy for a true Paasche (or Laspeyres) price index on the basis of prices. This is for example the case in German foreign trade statistics. Unit values are average prices referring to a 'commodity number' (CN), that...

Die Außenhandelsstruktur ist in einem steten Wandel begriffen; dies hat auch Auswirkungen auf den mit Importen gewichteten HWWA-Index der Rohstoffpreise. Um seine Bedeutung als zeitnaher Indikator der Preisentwicklung auf den internationalen Rohstoffmärkten zu behalten, muß er von Zeit zu...

In this paper, we seek to produce forecasts of commodity price movements that can systematically improve on naïve statistical benchmarks. We revisit how well changes in commodity currencies perform as potential efficient predictors of commodity prices, a view emphasized in the recent...

This Policy Brief introduces the Gini Trade Index (GTI) as a new trade synthetic key performance indicator capable of capturing the different distribution of trade values across firm characteristics and across countries. The new indicator replicates the well-known features of the traditional...