Full Papers -- Boolean Games with Epistemic Goals -- Minimal Preference Change -- The Topology of Belief, Belief Revision and Defeasible Knowledge -- Plan Recognition, Indefinites, and the Semantics-Pragmatics Boundary -- A Semantic Model for Interrogatives Based on Generalized Quantifiers and Bilattices -- A Two-Tiered Formalization of Social Influence -- A Unified Epistemic Analysis of Iterated Elimination Algorithms from Regret Viewpoint -- Listen to Me! Public Announcements to Agents That Pay Attention - or Not -- An Offer You Cannot Refuse: Obtaining Efficiency and Fairness in Preplay Negotiation Games with Conditional Offers -- Sequent Calculi for Multi-modal Logic with Interaction -- Dynamic Epistemic Logic Displayed -- Reasoning about Actions Meets Strategic Logics -- A Dynamic Deontic Logic Based on Histories -- Sequent Systems for Nondeterministic Propositional Logics without Reflexivity -- How to Update Neighborhood Models -- The Logic of a Priori and a Posteriori Rationality in Strategic Games -- Proof Theory, Semantics and Algebra for Normative Systems -- Explicit and Implicit Knowledge in Neighbourhood Models -- Expressivity Hierarchy of Languages for Epistemic Awareness Models -- Public Announcements, Private Actions and Common Knowledge in S5 Structures -- Logic Aggregation -- The Task Model of Court Investigation in a Multi-agent System of Argumentation in Court -- Short Papers -- A Deontic Action Logic for Complex Actions -- Planning Using Dynamic Epistemic Logic: Correspondence and Complexity -- Judgment Aggregation with Abstentions: A Hierarchical Approach -- A Note on Bayesian Games -- A Logic for Extensive Games with Short Sight -- Aggregated Beliefs and Informational Cascades -- Dynamic Attitudes, Fixed Points and Minimal Change -- Logic of Evidence-based Knowledge -- Backward Induction Is PTIME-complete -- On Fuzzy Propositional Logic with Different Negations.

This book collects the papers presented at the 4th International Workshop on Logic, Rationality and Interaction/ (LORI-4), held in October 2013 at the /Center for the Study of Language and Cognition, Zhejiang University, Hangzhou, China. LORI is a series that brings together researchers from a variety of logic-related fields: Game and Decision Theory, Philosophy, Linguistics, Computer Science and AI. This year had a special emphasis on Norms and Argumentation. Out of 42 submissions, 23 full papers and 11 short contributions have been selected through peer-review for inclusion in the workshop program and in this volume. The quality and diversity of these contributions witnesses a lively, fast-growing, and interdisciplinary community working at the intersection of logic and rational interaction.