Pre-conference proceedings of the Special Focus Symposium on 5th Catallactics: Quantitative-Behavioural Modelling of Human Actions and Interactions on Markets, Baden-Baden, August 2nd - August 3rd, 2007 : 19th International Conference on Systems Research, Informatics and Cybernetics, (July 30 - August 4th, 2007, Baden-Baden) - Loistl, Otto (UFZG [i. e.] Faculty of Teacher Education of the University of Zagreb, 2007)