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Just to clarify two points on Chris Tilbury's objection to random sample single questions. 1. I am talking about a very small proportion, so that on average any reader would receive one question (not a long questionnaire) every 3 or 6 months. 2. Jacob Palme's work was in the Swedish Defence Organisation. They wanted to know if their e-mail system was worth the money they were paying for it (i.e., what business benefits they were receiving). ---------------------- Dr. D. R. Newman, Queen's University Belfast, Queen's School of Management, BELFAST BT7 1NN, Northern Ireland (UK). http://www.qub.ac.uk/mgt/ FAX: +44-1232-249881 Tel. +44-1232-335011 mailto:[log in to unmask] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%