international journal of production economics Int. J. Production Economics 39 (1995) 307-308 Contents Volume 39 Vol. 39, Nos. 1/2 Editors’ introduction O.B. Olesen and N.C. Petersen Some unsolved problems in data envelopment analysis: A survey 0.B. Olesen A simulation study of hypothesis tests for differences in efficiencies R.D. Banker and H. Chang Efficiency measurement of production operations under uncertainty L. Gong and B. Smith Incentives and productivity measurements P. Bogetoft Comments R.M. Thrall Reply P. Bogetoft Comments Reply P. Bogetoft Non-frontier measures of efficiency, progress and regress for time series data Incorporating quality into data envelopment analysis: A stochastic dominance approach 0.B. Olesen and N.C. Petersen Productivity and quality changes in Swedish pharmacies R. Fare, S. Grosskopf and P. Roos .... Comment R. Fare, S. Grosskopf and P. Roos Assessing marginal impacts of investments on the performance of organisational units A.D. Athanassopoulos and E. Thanassoulis Comment O0.B. Olesen and N.C. Petersen Reply A.D. Athanassopoulos and E. Thanassoulis Measuring the macroeconomic performance of the Taiwanese economy C.A.K. Lovell Call for Papers Diary of Events 0925-5273/95/$09.50 © 1995 Elsevier Science B.V. All rights reserved 308 Contents Volume 39 Vol. 39, No. 3 Speed and efficiency — A statistical enquiry of manufacturing industries J. Holmstrém Cyclic and constant-proportion input-control strategies for dedicated flexible manufacturing system operations H. Co, H. Li and J. Zhu Positioning of automated guided vehicles in a loop layout to minimize the mean vehicle response time Development of a practical goal programming system for solving semi-large size multi-criterion planning problems G. Sun, T. Ui and H. Nakayasu An analysis of the diffusion of flexible manufacturing systems R.B. Handfield and M.D. Pagell Minimum cost single and double screening procedures with dichotomous peformance variable D.S. Bai and M.K. Lee .... Effects of rejects on in-process inventories in serial production lines D. Sculli and H.Y.V. Lo ate Direct database-simulation of a job-shop K.-H. Koh, R. de Souza and N.-C. Ho Selection of an automated inspection system using multiattribute decision analysis P.C. Pandey and A. Kengpol Diary of Events Announcement Author Index to Volume 39 Contents Volume 39 .