Preventing Under-Reporting in Social Task Allocation -- Reasoning and Negotiating with Complex Preferences Using CP-Nets -- Using Priced Options to Solve the Exposure Problem in Sequential Auctions -- Towards a Quality Assessment Method for Learning Preference Profiles in Negotiation -- Using a Memory Test to Limit a User to One Account -- Multi-attribute Regret-Based Dynamic Pricing -- On the Economic Effects of Competition between Double Auction Markets -- A Multiagent Recommender System with Task-Based Agent Specialization -- Towards Automated Bargaining in Electronic Markets: A Partially Two-Sided Competition Model -- Bidding Heuristics for Simultaneous Auctions: Lessons from TAC Travel -- Applications of Classifying Bidding Strategies for the CAT Tournament -- Coordinating Decisions in a Supply-Chain Trading Agent -- The 2007 TAC SCM Prediction Challenge.

This volume contains 13 thoroughly refereed and revised papers detailing recent advances in research on trading agents, negotiating agents, dynamic pricing, and auctions. They were originally presented at the 10th International Workshop on Agent-Mediated Electronic Commerce (AMEC 2008) collocated with AAMAS 2008 in Estoril, Portugal, or the 6th Workshop on Trading Agent Design and Analysis (TADA 2008) collocated with AAAI 2008 in Chicago, IL, USA. The papers originating from AMEC 2008 address agent modeling and multi-agent problems in the context of e-negotiations and e-commerce. The TADA papers stem from the effort to design scenarios where trading agents and market designers can be pitched against each other in applications from supply chain management and procurement. They are all characterized by interdisciplinary research combining fields such as artificial intelligence, distributed systems, game theory, and economics.