Theory and measurement : an essay in honor of Zvi Griliches / Charles R. Hulten -- Production function and wage equation estimation with heterogeneous labor : evidence from a new matched employer-employee data set / Judith Hellerstein and David Neumark -- Where does the time go? : concepts and measurement in the American time -- Use survey / Harley Frazis and Jay Stewart -- Technology and the theory of Vintage Aggregation / Michael J. Harper -- Why do computers depreciate? / Michael J. Geske, Valerie A. Ramey, and Matthew D. Shapiro -- Downward bias in the most important CPI component / Robert J. Gordon and Todd vanGoethem -- Pricing at the on-ramp to the internet : price indices for ISPs during the 1990s / Greg Stranger and Shane Greenstein -- Different approaches to estimating Hedonic indexes / Saeed Heravi and Mick Silver -- Price indexes for microsoft's personal computer software products / Jaison R. Abel, Ernst R. Berndt, and Alan G. White -- International comparisons of R&D expenditure : does an R&D PPP make a difference? / Sean M. Dougherty, Robert Inklaar, Robert H. McGuckin, and Bart van Ark -- Information technology and the G7 economies / Dale W. Jorgenson -- The role of semiconductor inputs in it hardware price decline : computers vs. communications / Ana Aizcorbe, Kenneth Flamm, and Anjum Khurshid -- Computer input, computer networks, and productivity / B. K. Atrostic and Sang Nguyen -- Services productivity in the United States : Griliches' services volume revisited / Barry P. Bosworth and Jack E. Triplett -- A consistent accounting of U.S. productivity growth / Eric J. Bartelsman and J. Joseph Beaulieu -- Should exact index numbers have standard errors? : theory and application to Asian growth / Robert C. Feenstra and Marshall B. Reinsdorf -- What really happened to consumption inequality in the U.S.? / Orazio Attanasio, Erich Battistin, and Hidehiko Ichimura -- Technology adoption from hybrid corn to beta blockers / Jonathan Skinner and Douglas Staiger.