Statistical offices try to match item models when measuring inflation between two periods. However, for product areas with a high turnover of differentiated models, the use of hedonic indexes is more appropriate since they include unmatched new and old models. There are two main competing...

Measurement of productivity in the service sector has always represented a challenge for economists. "Productivity in the U.S. Services Sector: New Sources of Economic Growth", by Jack Triplett and Barry Bosworth from the Brookings Institution is reviewed. The authors have produced a textbook on...

In this article, as part of the symposium on total factor productivity, Erwin Diewert of the University of British Columbia provides a comprehensive discussion of what is needed to develop reliable measures of total factor productivity in terms of output and the different classes of inputs. He...