Professor Sten Malmquist constructed the Malmquist quantity index and in doing so developed a distance function defined on a consumption space. This function is the consumer analog to the Shephard input distance function of producers and is used in ratio form to define the quantity index. This volume contains new contributions based on Malmquist's work nearly 50 years ago and provides modern perspectives on the value of this research.Professor Sten Malmquist constructed the Malmquist quantity index and in doing so developed a distance function defined on a consumption space. This function is the consumer analog to the Shephard input distance function of producers and is used in ratio form to define the quantity index. This volume contains new contributions based on Malmquist's work nearly 50 years ago and provides modern perspectives on the value of this research.Introduction; R. F?re, et al. Essay 1. Distance Functions in Consumer and Producer Theory; R.R. Russell. Essay 2. Input Price, Quantity, and Productivity Indices for a Revenue-Contrained Firm; B.M. Balk. Essay 3. Malmquist Productivity Indexes: A Survey of Theory and Practice; R. F?re, et al. Essay 4. Implementing the Malmquist Productivity Index: The Case of the National Corporation of Swedish Pharmacies; N.-O. Norlander, P. Roos. Essay 5. Malmquist Productivity Indexes: An Empirical Comparison; H. Bjurek, et al. Essay 6. Input and Output Indicators; R.G. Chambers. Appendix. Index.