A rich literature on the analysis of efficiency in production has developed since pioneering work of Tjalling Koopmans and George Debreu in the 1950s. This literature includes work by researchers in economics, econometrics, management science, operations research, mathematical statistics and...

Here, we consider the problem of aggregation of efficiency and productivity indices. We will summarize some of the existing results and will derive new results for aggregation of Hicks-Moorsteen productivity indices.