Journal Articles

• Rossi, G., Arteconi, S., Hales, D. (2009) Evolving Networks for Social Optima in the “Weakest Link Game”. Computational and Mathematical Organization Theory (CMOT), Vol. 15 No. 2. June 2009.. PDF. doi:10.1007/s10588-008-9051-1
  
• Edmonds, B., Norling, E., Hales, D. (2009) Towards the Evolution of Social Structure. Computational and Mathematical Organization Theory (CMOT), Vol. 15 No. 2. June 2009. PDF.  doi:10.1007/s10588-008-9052-2
  
• Marcozzi, A., Hales, D. (2008) Emergent Social Rationality in a Peer-to-Peer System. Advances in Complex Systems (ACS). vol. 11, issue 04, pages 581-595 . PDF.
• Hales, D.; Arteconi, S. (2008) Motifs in Evolving Cooperative Networks Look Like Protein Structure Networks. Networks and Heterogeneous Media (NHM), Vol. 3, No. 2, American Institute of Mathematical Sciences. PDF.
• Hales, D. (2006) Emergent Group-Level Selection in a Peer-to-Peer Network.  Complexus 2006;3:108-118 (DOI:10.1159/000094193). Available as PDF.
  
• Mollona, E. & Hales, D. (2006) Economia della conoscenza, Governo delle Risorse Umane e Confini dell'Impresa. Strategie organizzative emergenti in una simulazione ad agenti. Sistemi Intelligenti, a. XVIII, no. 2, agosto 2006. PDF.
  
• Hales, D. & Arteconi, S. (2006) SLACER: A Self-Organizing Protocol for Coordination in P2P Networks. IEEE Intelligent Systems, 21(2):29-35, March / April 2006. Available as PDF (150k).
  
• Mollona, E. & Hales, D. (2006) Knowledge-Based Jobs and the Boundaries of Firms - Agent-based simulation of Firms Learning and Workforce Skill Set Dynamics. Journal of Computational Economics 27(1):35-62. Available as PDF (2.8mb).
• Hales, D. & Edmonds, B. (2005) Applying a socially-inspired technique (tags) to improve cooperation in P2P Networks. IEEE Transactions in Systems, Man and Cybernetics - Part A: Systems and Humans, 35(3):385-395. Available as
PDF (448k).
• Edmonds, B & Hales, D. (2005) Computational Simulation as Theoretical Experiment. Journal of Mathematical Sociology 29(3):209-232 (see Discussion Paper CPM-02-106).
• Edmonds, B. & Hales, D. (2004) When and Why Does Haggling Occur - Some suggestions from a qualitative but computational simulation of negotiation. Journal of Artificial Societies and Social Simulation vol. 7, no. 2. Available at: http://jasss.soc.surrey.ac.uk/7/2/9.html
• Edmonds, B. & Hales, D. (2003) Replication, Replication and Replication - Some Hard Lessons from Model Alignment. Special Issue on Model-2-Model Comparison, Journal of Artificial Societies and Social Simulation vol. 6, no. 4. Available at: http://jasss.soc.surrey.ac.uk/6/4/11.html
• Hales, D. (2002) Group Reputation Supports Beneficent Norms. The Journal of Artificial Societies and Social Simulation (JASSS) vol. 5, no. 4. http://www.soc.surrey.ac.uk/JASSS/5/4/4.html
• Hales, D. (1998) An Open Mind is Not an Empty Mind - Experiments in the Meta-Noosphere. The Journal of Artificial Societies and Social Simulation (JASSS) vol. 1, no. 4. Available at: http://www.soc.surrey.ac.uk/JASSS/1/4/2.html

Journal Features / Reviews / Commentary

• Hales, D. (2011) The socio-economics of peer-to-peer systems. PerAda Magazine, Dec. 2011. PDF.
  
• Hales, D. (2008) Book Review: The Social Atom - Why the rich get richer, cheaters get caught and your neighbor usually looks like you by Mark Buchanan. The Journal of Artificial Societies and Social Simulation (JASSS) vol. 11, no. 3. http://jasss.soc.surrey.ac.uk/11/3/reviews/hales.html
  
• Hales, D. and Babaoglu, O. (2006) Towards Automatic Social Bootstrapping of Peer-to-Peer Protocols. In ACM SIGOPS Operating Systems Review (Special Issue on Self-Organizing Systems), vol. 40, no. 3, July 2006. Available as PDF.
  
• Hales, D. & Patarin, S. (2005) Feature: Computational Sociology for Systems "In the Wild": The Case of BitTorrent. IEEE Distributed Systems Online, vol. 6, no. 7, 2005. Available as PDF.
  
• Hales, D., Rouchier, J. and Edmonds, B. (2003) Editorial Introduction: Model-to-Model Analysis. Special Issue on Model-2-Model Comparison, Journal of Artificial Societies and Social Simulation vol. 6, no. 4. Available at:. http://jasss.soc.surrey.ac.uk/6/4/5.html
• Hales, D. (2002) Book Review: Evolution's Arrow: The Directions of Evolution and the Future of Humanity by John Stewart. The Journal of Artificial Societies and Social Simulation (JASSS) vol. 5, no. 1. http://www.soc.surrey.ac.uk/JASSS/5/1/reviews/hales.html
• Hales, D. & Marsden, P. (2002) Editorial: Memetics Malaise? The Journal of Memetics - Evolutionary Models of Information Transmission (JoM-EMIT) vol. 6, no. 2. Available at: http://jom-emit.cfpm.org/2002/vol6/editorial.html
• Hales, D. (2001) Book Review: "Introduction to Artificial Life by Christoph Adami". The Journal of Artificial Societies and Social Simulation (JASSS) vol. 4, no. 1. Available at: http://www.soc.surrey.ac.uk/JASSS/4/1/reviews/hales.html
• Hales, D. (1999) Commentary: Belief Has Utility - An Intentional Stance. The Journal of Memetics - Evolutionary Models of Information Transmission (JoM-EMIT) vol. 3, no. 1. Available at: http://www.cpm.mmu.ac.uk/jom-emit/1999/vol3/hales_d.html
• Hales, D. (1998) Report: Panel Discussion from the 1st Symposium on Memetics. The Journal of Memetics - Evolutionary Models of Information Transmission (JoM-EMIT) vol. 2, no. 3. Available at: http://www.cpm.mmu.ac.uk/jom-emit/1998/vol2/panel_discussion.html

Edited Volumes and Special Issues

• Hales, D., Edmonds, B., Spirakis, P., Babaoglu, O. (eds) (2009) Cooperation in Selfish Systems. Special issue of the the Journal of Computational and Mathematical Organization Theory (CMOT). Spinger. Vol. 15 No. 2. June 2009.
  
• A. Brueckner, S., Di Marzo, G., Serugendo, Hales, D., Zambonelli, F. (eds.) (2006) Engineering Self-Organising Systems. Proceedings of the 3rd Workshop on Engineering Self-Organising Applications (EOSA'05). Lecture Notes in Artificial Intellignece, 3910. Springer.
• Edmonds, B., Gilbert, N., Gustafson, S., Hales, D. and Krasnogor, N. (eds.) (2005) Socially Inspired Computing. Proceedings of the Joint Symposium on Socially Inspired Computing, University of Hertfordshire, Hatfield, UK 12 - 15 April 2005, Published by AISB. Availible as PDF (7mb).
• Hales, D., Edmonds, B., Norling, E. and Rouchier, J. (eds.) (2003) Multi-Agent Based Simulation III, Proceedings of the 4th International Workshop, MABS 2003, Melbourne, Australia, July 2003. Lecture Notes in Artificial Intellignece, 2927. Springer.
• Hales, D., Rouchier, J. and Edmonds, B. (eds.) (2003) Special Issue on Model-2-Model Comparison. Journal of Artificial Societies and Social Simulation 6(4).

Conferences and Book Chapters

• Rahman, R., Vinko, T., Hales, D., Pouwelse, J. and Sips, H. (2011). Design Space Analysis for Modeling Incentives in Distributed Systems. ACM SIGCOMM, 2011. PDF.
  
• Hales, D., (2010) Mix, Chain and Replicate: Methodologies for Agent-Based Modelling of Social Systems. In Mollona, E., (ed) Computational Analysis of Firms’ Organization and Strategic Behaviour. London and New York: Routledge. PDF.
  
• Hales, D., (2010) Rationality meets the Tribe: Recent Models of Cultural Group Selection. In Mollona, E., (ed) Computational Analysis of Firms’ Organization and Strategic Behaviour. London and New York: Routledge. PDF.
  
• Rahman, R. and Hales, D., Vinko, T., Pouwelse, J. and Sips, H. (2010). No more crash or crunch: sustainable credit dynamics in a P2P community. International Conference on High Performance Computing & Simulation (HPCS 2010),  Caen, France, 2010. PDF.
  
• Rahman, R., Meulpolder, M., Hales, D., Pouwelse, J. and Sips, H. (2010) Improving Efficiency and Fairness in P2P Systems with Effort-Based Incentives. Proceedings of the IEEE International Conference on Communications, 23-27th May 2010, Cape Town, South Africa. PDF.
  
• Hales, D., Rahman, R., Zhang, B., Meulpolder M., and Pouwelse, J. (2009) BitTorrent or BitCrunch: Evidence of a credit squeeze in BitTorrent? Proceedings of the 5th Collaborative Peer-to-Peer Systems (COPS) Workshop, in conjunction with 18th IEEE International Workshops on Enabling Technologies: Infrastructures for Collaborative Enterprises, June 29 - July 1, 2009, Groningen, the Netherlands. PDF.
  
• Rahman, R. and Hales, D. and Meulpolder, M. Heinink, V., Pouwelse, J. and Sips, H. (2009) Robust vote sampling in a P2P media distribution system. Proceedings IPDPS 2009 (HotP2P 2009), IEEE Computer Society. PDF.
  
• Hales, D., Arteconi, S., Marcozzi, A., Chao, I. (2008) Towards a group selection design pattern. In Meyer, F, (ed), The European Integrated Project "Dynamically Evolving, Large Scale Information Systems (DELIS)", Proceedings of the final workshop, Barceonla, February 27-28, 2008. Heinz Nixdirf Insitute, University of Paderborn, Band 222. PDF.
  
• Hales, D.; Arteconi, S. (2007) Motifs in Evolving Cooperative Networks Look Like Protein Structure Networks. Proceedings of the European Conference on Complex Systems 2007, Dresden. PDF.
  
• Marcozzi, A., Hales, D. (2007) Emergent Social Rationality in a Peer-to-Peer System. Proceedings of the European Conference on Complex Systems 2007, Dresden. PDF.
  
• Hales, D. (in press) Distributed Computer Systems. In Edmonds, B., Moss, S. (eds) Simulating Social Complexity: in memory of Herbert Simon, Springer. PDF.
  
• Hales, D. (2007) Understanding Tag Systems by Comparing Tag Models. In Edmonds, B., Iglesias, C., H., and Troitzsch, K. G, (eds) Social Simulation: Technologies, Advances and New Discoveries, Idea Group. PDF.
  
• Hales, D. (2007) Applying Evolutionary Approaches for Cooperation. In F.H.P. Fitzek and M. Katz. (eds) Cognitive Wireless Networks: Concepts, Methodologies and Visions. Springer. PDF.
  
• Hales, D.; Marcozzi, A.; Cortese, G. (2007) Towards Cooperative, Self-Organised Replica Management. Proceedings of the First International Conference on Self-Adaptive and Self-Organizining Systems (SASO2007), July 2007, Boston, MIT. IEEE Press. PDF.
  
• Jesi, G., Hales, D., van Steen, M. (2007) Identifying Malicious Peers Before It’s Too Late: A Decentralized Secure Peer Sampling Service. Proceedings of the First International Conference on Self-Adaptive and Self-Organizining Systems (SASO2007), July 2007, Boston, MIT. IEEE Press. PDF.
  
• Arteconi, S.; Hales, D.; Babaoglu, O. (2007) Greedy Cheating Liars and the Fools Who Believe Them. In Engineering Self-Organising Systems, Proceedings of the 4th International Workshop, ESOA 2006, Hakodate, Japan, May 9, 2006, Revised and Invited Papers. Brueckner, S.; Hassas, S.; Jelasity, M.; Yamins, D. (Eds.),  Lecture Notes in Computer Science , Vol. 4335, Springer.
  
• Hales, D. & Patarin, S. (2006) How to cheat BitTorrent and Why Nobody Does. Proceedings of the European Conference on Complex Systems (ECCS2006), Oxford. PDF.
  
• Hales, D., Arteconi, S. (2006) Friends for Free: Self-Organizing Artificial Social Networks for Trust and Cooperation. In Algorithmic Aspects of Large and Complex Networks, Stefano Leonardi and Friedhelm Meyer auf der Heide and Dorothea Wagner (eds.), Dagstuhl Seminar Proceedings no. 05361, Internationales Begegnungs- und Forschungszentrum (IBFI), Schloss Dagstuhl, Germany. link to online paper
• Hales, D.; Arteconi, S.; Babaoglu, O. (2005) SLACER: randomness to cooperation in peer-to-peer networks. Proceedings of the Workshop on Stochasticity in Distributed Systems (STODIS'05) including in the Proceedings of IEEE CollaborateCom Conference, Dec. 19, 2005. San Jose, CA. Availible as PDF (128k).
  
• Marcozzi, A.; Hales, D.; Jesi, G.; Arteconi, S.; Babaoglu, O. (2005) Tag-Based Cooperation in Peer-to-Peer Networks with Newscast. In Self-Organization and Autonomic Informatics (I), Volume 135 Frontiers in Artificial Intelligence and Applications, Edited by: H. Czap, R. Unland, C. Branki and H. Tianfield, IOS Press, Netherlands. See Technical Report UBLCS-2005-15.
  
• Gerhard Weikum, Peter Triantafillou, David Hales, Christian Schindelhauer  (in press) Towards Self-Organizing Query Routing and Processing for Peer-to-Peer WebSearch. Proceedings of the European Conference on Complex Systems (ECCS'05), Nov. 14th, Paris, France. Publishers: i6doc, Belgium.
  
• Hales, D. (2005) Altruism “For Free” using Tags. Proceedings of the European Conference on Complex Systems (ECCS'05), Nov. 14th, Paris, France. Availible as PDF (124kb).
  
• Hales, D. (2005) Emergent Group-Level Selection in a Peer-to-Peer Network. Proceedings of the European Conference on Complex Systems (ECCS'05), Nov. 14th, Paris, France. Available as PDF (468kb).
  
• Mollona, E. & Hales, D. (2005) Modeling Firm Skill-Set Dynamics as a Complex System. Proceedings of the European Conference on Complex Systems (ECCS'05), Nov. 14th, Paris, France. Available as PDF (664kb).
  
• Hales, D. (2005) Choose Your Tribe! - Evolution at the Next Level in a Peer-to-Peer Network. Presented at the 3rd Workshop on Engineering Self-Organising Applications (EOSA 2005) located with the AAMAS 2005 conference, July 26th, 2005, Utrect, Netherlands. See Technical Report UBLCS-2005-13.
  
• Hales, D. (2005) Engineering with Sociological Metaphors: Examples and Prospects. Presented at the AISB2005 Symposium - Engineering with Social Metaphors, University of Hertfordshire, UK, April 14th. Available as PDF (400k).
• Hales, D. (2005) Finding Cooperative (tag-based) Stereotypes with Semi-Automated Searching. Presented at the AISB2005 Symposium - Emerging Artificial Societies, University of Hertfordshire, UK, April 13th. Available as PDF (448k) or MS-Word (320k).
  
• Hales, D. (in press) Understanding Tag Systems by Comparing Tag Models. Presented at the Second Model-to-Model Workshop (M2M2) co-located with the 2nd European Social Simulation Association Conference (ESSA'04), Valladolid, Spain 16-19th of Sept 2004. Available as PS (1.5mb) or PDF (768k) or MS-Word (1.3mb).
• Hales, D. (2005) Self-Organising, Open and Cooperative P2P Societies – From Tags to Networks. Proceedings of the 2nd Workshop on Engineering Self-Organsing Applications (ESOA 2004 located with the AAMAS 2004 conference), LNCS 3464, pp.123-137. Springer. Available as PS (2.6MB) or PDF (258k) or MS-Word (113k).
• Hales, D. (2005) Change Your Tags Fast! - a necessary condition for cooperation? Proceedings of the Workshop on Multi-Agents and Multi-Agent-Based Simulation (MABS 2004), LNAI 3415, Springer, 2005. Available as PS (500k) or PDF (163k) or MS-Word (69k). Final version PDF (129k).
  
• Hales, D. (2005) Sociologically Inspired Approaches for Self-*: Examples and Prospects. In Ozalp Babaoglu, Mark Jelasity, Alberto Montresor, Christof Fetzer, Stefano Leonardi, Aad van Moorsel, Maarten van Steen (eds) Self-Star Properties in Complex Information Systems. Lecture Notes in Computer Science, Hot Topics, 3460, Springer-Verlag, Berlin. Available as: PDF (456k).
• Hales, D. (2004) From Selfish Nodes to Cooperative Networks – Emergent Link-based Incentives in Peer-to-Peer Networks. In proceedings of The Fourth IEEE International Conference on Peer-to-Peer Computing (p2p2004), 25-27 August 2004, Zurich, Switzerland. IEEE Computer Society Press. Available as PS (526k) or PDF (290k) or MS-Word (170k).
• Hales, D. & Edmonds, B. (2004) Can Tags Build Working Systems? From MABS to ESOA. In Di Marzo Serugendo, G.; Karageorgos, A.; Rana, O.F.; Zambonelli (eds.) Engineering Self-Organising Systems - Nature-Inspired Approaches to Software Engineering. Lecture Notes in Artificial Intelligence 2977, Springer, Berlin. Presented at the ESOA 2003 workshop. (see Discussion Paper CPM-02-117).
• Hales, D. (2004) The Evolution of Specialization in Groups. In Lindemann, G., Moldt, D. and Paolucci, M., (Eds.) Regulated Agent-Based Social Systems - 1st Intnerational Workshop, RASTA 2002 Bologna, Italy, July 2002. Revised Selected and Invited Papers. Lecture Notes in Artificial Intelligence 2934. Berlin: Springer-Verlag. Available as: Postscript (0.3MB) or MS-Word (95K)
  
• Hales, D. (2004) Memetic Engineering and Culture Evolution. In Knowledge Management, Organizational Intelligence and Learning, and Complexity, (Ed. L. Douglas Kiel), in Encyclopedia of Life Support Systems (EOLSS), Developed under the Auspices of the UNESCO, Eolss Publishers, Oxford , UK. See: http://www.eolss.net. Available as: PDF (200kb).
• Hales, D. & Edmonds, B. (2003) Evolving Social Rationality for MAS using "Tags", In.Rosenchein, J.S., et al (ed.) Proceedings of the 2nd International Conference on Autonomous Agents and Multiagent Systems, Melbourne, July 2003 (AAMAS 2003), ACM Press, 497-503. (see Discussion Paper CPM-02-104).
• Hales, D. (2002) Evolving Specialisation, Altruism and Group-Level Optimisation Using Tags. In Sichman, J. S., Bousquet, F. Davidsson, P. (Eds.) Multi-Agent-Based Simulation II. Lecture Notes in Artificial Intelligence 2581. Berlin: Springer-Verlag.  Available as: Postscript (0.5MB) or MS-Word (89K)
  
• Hales, D. & Douce, C. (2002) Modelling Software Organisations. In Kuljis, J., Baldwin, L., Scoble, R. (Eds.) Proceedings of the 14th Annual Workshop of the Psychology of Programming Interest Group, Brunel University, London, UK. Available as: CPM-02-93.
• Hales, D. (2000) Cooperation without Space or Memory: Tags, Groups and the Prisoner's Dilemma. In Moss, S., Davidsson, P. (Eds.) Multi-Agent-Based Simulation. Lecture Notes in Artificial Intelligence 1979. Berlin: Springer-Verlag. Available as: Postscript (0.4MB) or MS-Word (80K)
• Hales, D. (1998) Artificial Societies, Theory Building and Memetics. Presented at the Memetics Symposium. Proceedings of the 15th International Conference on Cybernetics, International Association for Cybernetics (IAC), Namur: Belgium. Available as: Postscript (0.3MB) or MS-Word (65K)
• Hales, D. (1998) Stereotyping, Groups and Cultural Evolution. In Sichman, J., Conte, R., & Gilbert, N. (Eds.) Multi-Agent Systems and Agent-Based Simulation. Lecture Notes in Artificial Intelligence 1534. Berlin: Springer-Verlag. Available as: Postscript (0.7MB) or MS-Word (82K)
• Hales, D. (1998) Selfish Memes and Selfless Agents - Altruism in the SwapShop. In Proceedings of the 3rd International Conference on Multi-Agent Systems (ICMAS'98). California: IEEE Computer Society. Available as: Postscript (0.7MB) or MS-Word (113K)
• Hales, D. (1997) Modelling Meta-Memes. In R. Conte, R. Hegselmann & P. Terna (Eds.) Simulating Social Phenomena. Berlin: Springer-Verlag. Available as: Postscript (1.3MB) or MS-Word (650K)

Technical Reports and Discussion Papers

• David Hales et al (2011) QLECTIVES Report D2.1.2: Fundamental algorithms for sustaining cooperation in realistic environments. d2.1.2.pdf
  
• David Hales et al (2010) QLECTIVES Report D2.1.1: Candidate theory models for cooperation algorithms. d2.1.1.pdf
  
• Rameez Rahman, Michel Meulpolder, David Hales, Johan Pouwelse, Henk Sips. (2009) Revisiting Social Welfare in P2P. Technical report PDS-2009-003. Parallel and Distributed Systems, Technical University of Delft, 2009.
  
• Ali Abbas, David Hales, Johan Pouwelse, and Dick Epema (2009) A gossip-based distributed social networking system. Technical report PDS-2009-001. Parallel and Distributed Systems, Technical University of Delft, 2009.
  
• Rahman, R., Hales, D., Meulpolder, M., Clements, M., Heinink, V., Pouwelse, V., Sips, H. (2008) Robust vote sampling in a P2P media distribution system. Technical Report PDS-2008-004, Parallel and Distributed Systems, Technical University of Delft, May 2008.
  
• Many authors (2007) DELIS Report D4.3.4: Evolutionary approaches to coalition formation in dynamic nets. d4.3.4.pdf.
  
• Many authors (2007) DELIS Report D5.2.5: Degeneracy and redundancy in self-organised systems. d5.2.5.pdf.
  
• Many authors (2007) DELIS Report D5.3.2: Applications of bio- and socio-inspired algorithms in information systems. d5.3.2.pdf.
  
• Many authors (2007) DELIS Report D5.3.3: Bio- and socio-inspired approaches in information systems - lessons learned. d5.3.3.pdf.
  
• Many authors (2007) DELIS Report D5.4.3: Form and function in evolving information systems. d5.4.3.pdf
  
• Hales, D.; Arteconi, S.; Marcozzi, A.; Chao, I. (2006) Towards a Group Selection Design Pattern. November 2007, Technical Report UBLCS-2007-25, University of Bologna, Dept. of Computer Science.
  
• Hales, D. (2007) Rationaliy and Power: the "gap in the middle" in ICT. Position paper presented at FET COSI-ICT workshop, Dresden, Oct. 6th. PDF.
  
• Hales, D.; Marcozzi, A.; Cortese, G. (2007) Towards Cooperative, Self-Organised Replica Management. January 2007, Technical Report UBLCS-2007-02, University of Bologna, Dept. of Computer Science.
• Many authors (2006) DELIS Report D4.3.3: Evolutionary and socially inspired algorithms, tools and applications in dynamic nets. D4.3.3.pdf.
  
• Many authors (2006) DELIS Report D5.2.4: Modeling open source development as evolving networks. D5.2.4.pdf.
  
• Many authors (2006) DELIS Report D5.3.1: From biological and social algorithms to engineering solutions. D5.3.1.pdf.
  
• Many authors (2006) DELIS Report D5.4.2: Understanding and engineering multi-scale selection in evolving dynamic networks. D5.4.2.pdf
  
• Many authors (2006) DELIS Report D5.5.1: Identifying and promoting industrial applications and knowledge transfer. D5.5.1.pdf.
  
• Many authors (2006) DELIS Report D5.6.2: Development of an integrated package for network evolutionary dynamics. D5.6.2.pdf
  
• Hales, D.; Arteconi, S. (2006) Motifs in Evolving Cooperative Networks Look Like Protein Structure Networks. December 2006, Technical Report UBLCS-2006-29, University of Bologna, Dept. of Computer Science.
  
• Marcozzi, A.; Hales, D. (2006) Emergent Social Rationality in a Peer-to-Peer System. October 2006, Technical Report UBLCS-2006-23, University of Bologna, Dept. of Computer Science.
  
• Arteconi, S., Hales, D. (2006) Broadcasting at the Critcial Threshold. October 2006, Technical Report UBLCS-2006-22, University of Bologna, Dept. of Computer Science.
• Rossi, G., Arteconi, S., Hales, D. (2006) Evolving Networks for Social Optima in the "Weakest Link Game". July 2006, Technical Report UBLCS-2006-21, University of Bologna, Dept. of Computer Science.
• Hales, D. & Babaoglu, O. (2006) Automatic Social Boostrapping. June. 2006, Technical Report UBLCS-2006-19, University of Bologna, Dept. of Computer Science.
• Many authors (2005) DELIS Report D5.1.1: Desirable lifelike properties in large-scale information systems. D5.1.1.pdf.
• Many authors (2005) DELIS Report D5.2.2: Optimal strategies for the collective construction of efficient information-processing webs. D5.2.2.pdf.
• Many authors (2005) DELIS Report D5.2.3: Degeneracy for redundancy in human-constructed information systems. D5.2.3.pdf.
• Many authors (2005) DELIS Report D5.4.1: Application of "motif analysis'' to artificial evolving networks. D5.4.1.pdf.
• Many authors (2005) DELIS Report D4.3.2: Initial Tools for Network Evolution, Characterisation and Design. D4.3.2.pdf.
  
• Many authors (2005) DELIS Report D5.6.1: Classification of families of information networks based on their topological and functional structures and their relation with the underlying fitness landscape. D5.6.1.pdf.
• Arteconi, S. & Halers, D. (2005) Greedy Cheating Liars and the Fools Who Believe Them. Dec. 2005, Technical Report UBLCS-2005-21.
  
• Hales, D. & Arteconi, S. (2005) Friends for Free:Self-Organizing Artificial Social Networks for Trust and Cooperation. Sept 2005, http://arxiv.org/abs/cs.MA/0509037
  
• Marcozzi, A.; Hales, D.; Jesi, G.; Arteconi, S.; Babaoglu, O. (2005) Tag-Based Cooperation in Peer-to-Peer Networks with Newscast. University of Bologna, Dept. of Computer Science, May 2005, Technical Report UBLCS-2005-15.
  
• Hales, D. (2005) Choose Your Tribe! - Evolution at the Next Level in a Peer-to-Peer Network. University of Bologna, Dept. of Computer Science, May 2005, Technical Report UBLCS-2005-13.
  
• Hales, D. & Patarin, S. (2005) How to cheat BitTorrent and why nobody does. University of Bologna, Dept. of Computer Science, May 2005, Technical Report UBLCS-2005-12.
  
• Mollona, E. & Hales, D. (2004) Knowledge-Based Jobs and the Boundaries of Firms - Agent-based simulation of Firms Learning and Workforce Skill Set Dynamics. Presetned at the Wild@Ace workshop, Dec 3-4, Torino, Italy. Available as: pre-proceedings: PDF (124k), post-proceedings: PDF (132k) Technical Report UBLCS-2005-14.
• Many authors (2004) DELIS Project Report D5.2.1: Algorithmus to Identify Locally Efficient Sub-graphs in Information Transfer Networks. D5.2.1.pdf.
• Many authors (2004) DELIS Project Report D4.3.1: An evaluation of the currently known "evolutionary game theory" approaches. D4.3.1.pdf.
• Hales, D. & Edmonds, B. (2004) Sociologically Inspired Engineering.  In AgentLink News issue 15. Available at: http://www.agentlink.org/newsletter/15/AL-15.pdf and The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-136.
• Hales, D. & Edmonds, B. (2004) Fashioning social simulations into engineering tools – the case of cooperation on P2P networks. The University of Bologna, Italy & The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-134.
• Rouchier, J. & Hales, D. (2003) How To Be Loyal, Rich And Have Fun Too - The Fun Is Yet To Come. Presented at the 1st ESSA Conference in Gronigan on the 21st of Sept. 2003. Available in the online proceedings and as Discussion Paper CPM-03-122.
• Edmonds, B. & Hales, D. (2003) When and why does haggling occur? - some lessons from a qualitative but computational simulation of negotiation. Presented at the 1st ESSA Conference in Groningha on the 21st of Sept. 2003. Available in the online proceedings.
• Hales, D.(2002) Neg-o-Net - a negotiation simulation test-bed. The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-109.
• Edmonds, B. & Hales, D. (2003) Computational Simulation as Theoretical Experiment. The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-106.
• Hales, D. & Edmonds, B. (2002) Evolving Social Rationality for MAS using "Tags". The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-104.
• Hales, D.(2002) Group Reputation Supports Beneficent Norms. The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-101.
• Hales, D.(2002) Understanding Our Creations: Using Machine Learning to Understand Machine Models The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-96.
• Hales, D. & Douce, C. (2002) Modelling Software Organisations. The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-93.
• Hales, D. (2002) Wise-Up! - Smart Tag Pairing Evolves and Persists The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-90.
• Hales, D. (2002) Smart Agents Don't Need Kin - Evolving Specialisation and Cooperation with Tags. The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-89.
• Hales, D. (2002) Cooperation and Specialisation without Kin Selection. The Centre for Policy Modelling, Manchester Metropolitan University, UK. Discussion Paper CPM-02-88.
• Davidson, P., Moss, S., Hales, D., Gotts, N., Wijngaards, N. (2001) The Agent Based Social Simulation (ABSS) SIG Report AgentLink News issue 8. Available at: http://www.agentlink.org/newsletter/8/AL-8.pdf
• Hales, D. & Scott, P.D. (2001) How Many Binary Concepts are Learnable and Why? Dept. Computer Science, University of Essex, Technical Report No.347.
• Scott, P.D. & Hales, D. (2001) Characterising Data Set Difficulty: An Investigation using Artificial Data Sets. Dept. Computer Science, University of Essex, Technical Report No.348.
• Scott, P.D. & Hales, D. (2001) The effect of training set size on the performance of classification learning procedures. Dept. Computer Science, University of Essex, Technical Report.
  
• Hales, D. (2001) Tag Based Co-operation in Artificial Societies.  Ph.D. Thesis, Department of Computer Science, University of Essex.
• Hales, D. (1998) Artificial Society Methodology & Cultural Evolution. Unpublished 2nd year report. June 1998, Department of Computer Science, University of Essex.
• Hales, D. (1997) Memetic Evolution & Suboptimisation. Unpublished 1st year report. September 1997, Department of Computer Science, University of Essex.
• Hales, D. (1995) Modelling Meta-Memes. MSc dissertation. Department of Computer Science, University of Essex.

Posters

• Hales, D.; Marcozzi, A.; Cortese, G. (2007) Towards Cooperative, Self-Organised Replica Management. Poster presented at the European Conference on Complex Systems (ECCS'07), Oct. 2007, Dresden, Germany. PDF.
  
• Marcozzi, A. & Hales, D. (2006) Emergent Socially Rational Utilitarianism in a Peer-to-Peer System. Poster presented at the European Conference on Complex Systems (ECCS'06), Sept 2006, Oxford, UK. PDF.
  
• Arteconi, S. & Hales, D. (2006) Greedy Cheating Liars and the Fools Who Believe Them. Poster presented at the European Conference on Complex Systems (ECCS'06), Sept 2006, Oxford, UK. PDF.
  
• Patarin, S. & Hales, D. (2005) Why Does BitTorrent Work So Well? Poster presented at the European Conference on Complex Systems (ECCS'05), Nov. 14-18th, Paris, France. Available as: PDF (1.4mb) or Adobe Illustrator (1.6mb) also see extended abstract PDF (8kb).
• Hales, D. (2004) Selfish Rewiring for Cooperation - Emergent link-based incentives in a peer-to-peer simulation. Poster presented at the European Conference on Complex Systems (ECCS'04), Dec 5-7th, Torino, Italy. Available as: PDF (1.6MB) or Adobe Illustrator (1.7MB)
• Mollona, E. & Hales, D. (2004) Learning without Earning - Knowledge-Based Jobs and Long-Term Firms' Strategy. Poster presented at the European Conference on Complex Systems (ECCS'04), Dec 5-7th, Torino, Italy. Available as: PDF (1.0MB) or Adobe Illustrator (1.1MB)