Introduction. Equations and Inequalities in the Theory of Measurement (W. Eichhorn). Discussion. Non-Parametric Tests of Additive Derivative Constraints (T. Stoker). Discussion. Poverty Indices and Decomposability (J.E. Foster and A. Shorrocks). Discussion. Optimal Uniform Taxation and the Structure of Consumer Preferences (T. Besley and I. Jewitt). Discussion. A Comment by T. Gorman. Aggregate Production Functions and Productivity Measurement: A New Look (J. Muellbauer). Discussion. A Model of Cake Division with a Blind Player & Gamblers and Liars (C. Bliss). Discussion. The Estimation of Engel Curves (S. Pudney). Discussion. Econometric Approaches to the Specification and Estimation of Intertemporal Consumer Behaviour (R. Blundell). Discussion. More Measures for Fixed Factors (T. Gorman). Discussion. Use and Misuse of Single Consumer Results in a Multi-Consumer Economy: The Optimality of Proportional Commodity Taxation (C. Blackorby, R. Davidson and W. Schworm). Discussion. Author Index. Subject Index.