Introduction Editor's Introduction Amy Greenwald i Feature Articles A Comparative Illustration of AI Planning-based Web Services Composition Seog-Chan Oh, Dongwon Lee and Soundar R. T. Kumara 1 Propositional-Logic Approach to One-Shot Multi Issue Bilateral Negotiation Azzurra Ragone, Tommaso Di Noia, Eugenio Di Sciascio and Francesco M. Donini 11 A Survey of Bargaining Models for Grid Resource Allocation Kwang Mong Sim 22 A Rule-based Approach to Norm-oriented Programming of Electronic Institutions A. Garcia-Camino, J. A. Rodriguez-Aguilar and C. Sierra 33 A Comparison of Bidding Strategies for Simultaneous Auctions Teddy Candale and Sandip Sen 41 ISSN 1551-9031