24 / Evaluation of Virtual Agents Attributed with Theory of Mind in a Real Time Action Game / Mark Hoogendoorn, Jeremy Soumokil / 1.1
26 / When Should There be a "Me" in "Team"? Distributed Multi-Agent Optimization Under Uncertainty / Matthew Taylor, Manish Jain, Yanqin Jin, Makoto Yokoo, Milind Tambe / 2.1
28 / Reasoning about Agents and Protocols via Goals and Commitments / Amit Chopra, Fabiano Dalpiaz, Paolo Giorgini, John Mylopoulos / 11.1
31 / Augmenting Appearance-Based Localization and Navigation using Belief Update / Guy Shani, George Chrysanthakopoulos / 4.1
32 / Strategic Planning for Probabilistic Games with Incomplete Information / Henning Schnoor / 21.1
35 / Moving Target D* Lite / Xiaoxun Sun, William Yeoh, Sven Koenig / 1.2
36 / Monotone cooperative games and their threshold versions / Haris Aziz, Felix Brandt, Paul Harrenstein / 18.1
40 / Frequency Adjusted Multi-agent Q-learning / Michael Kaisers, Karl Tuyls / 6.1
44 / On the Logic of Argumentation Theory / Davide Grossi / 8.1
46 / Complexity of Judgment Aggregation: Safety of the Agenda / Ulle Endriss, Umberto Grandi, Daniele Porello / 13.1
47 / Decision Making with Dynamically Arriving Information / Meir Kalech, Avi Pfeffer / 5.2
51 / Manipulation of Copeland Elections / Piotr Faliszewski, Edith Hemaspaandra, Henning Schnoor / 13.2
52 / Dependence Theory via Game Theory / Davide Grossi, Paolo Turrini / 18.6
53 / Using Geometric Diffusions for Recognition-Primed Multi-Agent Decision Making / Xiaocong Fan, Meng Su / 5.3
64 / Optimal Social Laws / Thomas Ågotnes, Michael Wooldridge / 13.3
65 / Partial Order Reductions for model checking temporal epistemic logic over interleaved mulit-agent sy / Alessio Lomuscio, Wojciech Penczek, Hongyang Qu / 14.1
80 / Agents and Artefacts for Multiple Models co-evolution (AA4MM) / Julien Siebert, Laurent Ciarletta, Vincent Chevier / 9.1
81 / Collective Argument Evaluation as Judgement Aggregation / Iyad Rahwan, Fernando Tohme / 8.2
85 / Ants Meeting Algorithms / Asaf Shiloni, Alon Levy, Ariel Felner, Meir Kalech / 4.2
87 / Combining statistics and arguments to compute trust / Paul-Amaury Matt, Maxime Morge, Francesca Toni / 10.1
89 / Using Counterfactual Regret Minimization to Create Competitive Multiplayer Poker Agents / Nick Abou Risk, Duane Szafron / 3.1
92 / What Should Be Learned In Agent-Centered Search? / Sturtevant Nathan, Vadim Bulitko, Yngvi Bjornsson / X.2
103 / Using Graph Analysis to Study Networks of Adaptive Agent / Sherief Abdallah / 9.2
104 / On the Role of Distances in Defining Voting Rules / Edith Elkind, Piotr Faliszewski, Arkadii Slinko / 14.2
106 / Programming Norm Change / Nick Tinnemeier, Mehdi Dastani, John-Jules Meyer / 19.1
112 / On the Limits of Dictatorial Classification / Reshef Meir, Ariel Procaccia, Jeffrey Rosenschein / 7.1
118 / Point-Based Policy Generation for Decentralized POMDPs / Feng Wu, Shlomo Zilberstein, Xiaoping Chen / 27.1
119 / Avoiding the Prisoner's Dilemma in Auction-based Negotiations for Highly Rugged Utility Spaces / Ivan Marsa-Maestre, Miguel A. Lopez-Carmona, Juan R. Velasco, Enrique de la Hoz / 8.3
127 / Honor Among Thieves - Collusion In Multi-Unit Auctions / Yoram Bachrach / 7.2
129 / Path Disruption Games / Yoram Bachrach, Ely Porat / 18.3
135 / Strategy Exploration in Empirical Games / Patrick Jordan, Michael Wellman / 18.4
170 / Learning Context Conditions for BDI Plan Selection / Dhirendra Singh, Sebastian Sardina, Lin Padgham, Stephane Airiau / 6.3
171 / Changing Neighbours: Improving Tag-Based Cooperation / Nathan Griffiths, Michael Luck / 10.6
183 / Finding Contingent Plans with Loops by Incrementally Generalizing and Merging Classical Plans / Siddharth Srivastava, Neil Immerman, Shlomo Zilberstein / 27.2
185 / Opportunistic Belief Reconciliation During Distributed Interactions / Paul Martin, Dave Robertson, Michael Rovatsos / 8.4
186 / Minimal Retentive Sets in Tournaments / Felix Brandt, Markus Brill, Felix Fischer, Paul Harrenstein / 13.4
189 / Distributed Multiagent Learning with a Broadcast Adaptive Subgradient Method / Renato Cavalcante, Alex Rogers, Nick Jennings, Isao Yamada / 6.4
190 / Flexible Task Resourcing for Intelligent Agents / Murat Sensoy, Wamberto Vasconcelos, Timothy Norman / 11.2
192 / A General, Fully Distributed Multi-Agent Planning Algorithm / Raz Nissim, Ronen Brafman, Carmel Domshlak / 27.3
196 / Risk-Sensitive Planning in Partially Observable Environments / Janusz Marecki, Pradeep Varakantham / 27.4
203 / An Agent-Based Framework to Support Crime Prevention / Tibor Bosse, Charlotte Gerritsen / 9.3
208 / Alternating-time Dynamic Logic / Nicolas Troquard, Dirk Walther / 11.3
210 / How important are simulation schemes in multi-agent systems? / Nazim Fatès, Vincent Chevier / 9.4
211 / Resource-bounded alternating-time temporal logic / Natasha Alechina, Brian Logan, Hoang Nga Nguyen, Abdur Rakib / 11.4
219 / A Game-Theoretic Analysis of Market Selection Strategies for Competing Double Auction Marketplaces / Bing Shi, Enrico Gerding, Perukrishnen Vytelingum, Nick Jennings / 23.1
224 / Decision Rules and Decision Markets / Abraham Othman, Tuomas Sandholm / 7.3
226 / When Do Markets with Simple Agents Fail? / Abraham Othman, Tuomas Sandholm / 23.2
227 / A Logic-Based Representation for Coalitional Games with Externalities / Tomasz Michalak, Dorota Marciniak, Marcin Szamotulski, Talal Rahwan, Peter McBurney, Michael Wooldridge, Nick Jennings / 2.3
228 / Finding Approximate Competitive Equilibria: Efficient and Fair Course Allocation / Abraham Othman, Eric Budish, Tuomas Sandholm / 23.3
238 / Enumeration and Exact Design of Weighted Voting Games / Bart de Keijzer, Tomas Klos, Yingqian Zhang / 13.5
243 / To Teach or not to Teach? Decision Making Under Uncertainty in Ad Hoc Team / Peter Stone, Sarit Kraus / 2.2
245 / Combining Function Approximation, Human Teachers, and Training Regimens for Real-World RL / Peng Zang, Arya Irani, Peng Zhou, Charles Isbell, Andrea Thomaz / 6.5
248 / High-level Reinforcement Learning in Strategy Games / Christopher Amato, Guy Shani / 1.3
250 / Stackelberg vs. Nash in Security Games: Interchangeability, Equivalence, and Uniqueness / Zhengyu Yin, Dmytro Korzhyk, Christopher Kiekintveld, Vincent Conitzer, Ronald Parr, Milind Tambe / 18.5
251 / Strategy-proof Allocation of Multiple Items without Payments or Priors / Mingyu Guo, Vincent Conitzer / 23.4
253 / Preference Elicitation for Risky Prospects / Greg Hines, Kate Larson / 23.5
258 / Asynchronous Algorithms for Approximate Distributed Constraint Optimization with Quality Bounds / Christopher Kiekintveld, Zhengyu Yin, Atul Kumar, Milind Tambe / 2.4
259 / Inter-Robot Transfer Learning for Perceptual Categorization / Kira Zsolt / 4.3
282 / A Systematic Agent Framework for Situated Autonomous Systems / Frederic Py, Kanna Rajan, Conor McGann / 4.4
283 / Agent-based Micro-Storage Management for the Smart Grid / Perukrishnen Vytelingum, Thomas D. Voice, Sarvapali Ramchurn, Alex Rogers, Nick Jennings / Y.2
284 / Characterising and Matching Iterative and Recursive Agent Interaction Protocols / Tim Miller, Peter McBurney / 25.1
294 / Aggregating Preferences in Multi-Issue Domains by Using Maximum Likelihood Estimators / Lirong Xia, Vincent Conitzer, Jerome Lang / 13.6
296 / Agent Composition Synthesis based on ATL / Guiseppe De Giacomo, Paolo Felli / 11.6
298 / An Architecture for Modular Distributed Simulation with Agent-Based Models / David Scerri, Sarah Hickmott, Lin Padgham, Alexis Drogoul / 9.5
308 / Worst-case efficiency ratio in false-name-proof combinatorial auction mechanisms / Atsushi Iwasaki, Vincent Conitzer, Mingyu Guo, Taiki Todo, Yoshifusa Omori, Yuko Sakurai, Makoto Yokoo / 7.4
312 / Cooperative Problem Solving against Adversary:Quantified Distributed Constraint Satisfaction Problem / Satomi Baba, Naofumi Nishimura, Atsushi Iwasaki, Makoto Yokoo, Marius Silaghi, Katsutoshi Hirayama, Toshihiro Matsui / 16.4
313 / PAC-MDP Learning with Knowledge-based Admissible Models / Marek Grzes, Daniel Kudenko / 6.6
328 / Complexity of Social Welfare Optimization in Multiagent Resource Allocation / Magnus Roos, Joerg Rothe / 7.5
332 / Improving DPOP with Function Filtering / pedro meseguer / 2.5
333 / On Events in Multi-Robot Patrol in Adversarial Environments / Noa Agmon / 4.5
339 / Distributed BDD-based BMC for the Verification of Multi-Agent Systems / Andrew Jones, Alessio Lomuscio / 14.3
340 / Optimal Temporal Decoupling in Multiagent Systems / Léon Planken, Mathijs de Weerdt, Cees Witteveen / 16.5
343 / CTL-STIT: enhancing ATL to express important multi-agent system verification properties / Jan Broersen / 14.4
352 / I Mean It! Detecting user intentions to create believable behaviour for virtual agents in games / Eurico Doirado, Carlos Martinho / 1.4
356 / Agent Programming via Planning Programs / Guiseppe De Giacomo, Fabio Patrizi, Sebastian Sardina / 11.5
367 / Adaptive Expressiveness -- Virtual Conversational Agents That Can Align to Their Interaction Partner / Hendrik Buschmeier, Kirsten Bergmann, Stefan Kopp / 1.5
368 / Divide and Coordinate: solving DCOPs by agreement / Meritxell Vinyals, Marc Pujol, Juan Antonio Rodriguez Aguilar, Jesús Cerquides / 2.6
378 / Agent Interaction, Multiple Perspectives, and Swarming Simulation / H. Van Dyke Parunak, Sven Brueckner, Robert Bisson / 9.6
379 / UAV Swarm Coordination using Cooperative Control for establishing a Wireless Communications Backbone / Achudhan Sivakumar, Colin Tan / 24.1
390 / A Decentralised Coordination Algorithm for Maximising Sensor Coverage in Large Sensor Networks / Ruben Stranders, Alex Rogers, Nick Jennings / 24.2
392 / Making Norms Concrete / Huib Aldewereld, Sergio Álvarez-Napagao, Frank Dignum, Javier Vazquez-Salceda / 15.1
393 / Optimal Planning Against Fictitious Players / Enrique Munoz de Cote, Nick Jennings / 21.3
398 / Cultivating Desired Behavior: Policy Teaching Via Environment-Dynamics Tweaks / Zinovi Rabinovich, Lachlan Dufton, Kate Larson, Nick Jennings / 21.6
403 / Optimal Policy Switching Algorithms for Reinforcement Learning / Gheorghe Comanici, Doina Precup / 17.1
409 / Using Virtual Agents to Simulate Interpersonal Communication Coordination of Different Cultures / Birgit Endrass, Lixing Huang, Jonathan Gratch, Elisabeth Andre / 1.6
421 / Learning Multi-Agent State Space Representations / Yann-Michaël De Hauwere, Peter Vrancx, Ann Nowe / 17.2
434 / A Model of Normative Power / Nir Oren, Michael Luck, Simon Miles / 15.2
436 / Modeling multi-agent scenarios involving agents knowledge about other's knowledge using ASP / Chitta Baral, Gregory Gelfond, Enrico Pontelli, Tran Son / 5.1
440 / Scalable Mechanism Design for the Procurement of Services with Uncertain Durations / Enrico Gerding, Sebastian Stein, Kate Larson, Alex Rogers, Nick Jennings / 7.6
441 / Aggregation-mediated Collective Perception and Action in a Swarm of Miniaturized Robots / Grégory Mermoud, Loïc Matthey, Christopher Evans, Alcherio Martinoli / 4.6
444 / Dominating Sets of Agents in Visibility Graphs: Distributed Algorithms for Art Gallery Problems / Evan Sultanik, Ali Shokoufandeh, William Regli / 16.6
447 / Laplacian-Based Consensus on Spatial Computers / Nelson Elhage, Jacob Beal / 22.1
455 / An Effective Personal Mobile Robot Agent Through a Symbiotic Human-Robot Interaction / Stephanie Rosenthal, Joydeep Biswas, Manuela Veloso / 22.2
463 / Modeling Recursive Reasoning by Humans Using Empirically Informed Interactive POMDPs / Prashant Doshi, Xia Qu, Adam Goodie, Diana Young / 25.3
466 / Classification and Strategical Issues of Argumentation Games on Structured Argumentation Frameworks / Matthias Thimm, Alejandro J. Garcia / 25.6
469 / A Quantified Distributed Constraint Optimization Problem / Toshihiro Matsui, Marius Silaghi, Katsutoshi Hirayama, Makoto Yokoo, Hiroshi Matsuo, Satomi Baba / 20.3
472 / MADCAP: MDP Approximate Dynamic Programming with Affine ADDs / Scott Sanner, William Uther, Karina Valdivia Delgado / 21.4
483 / Trading Agents for the Smart Electricity Grid / Perukrishnen Vytelingum, Sarvapali Ramchurn, Thomas D. Voice, Alex Rogers, Nick Jennings / 23.6
487 / Role Evolution in Open Multi-Agent Systems as an Information Source for Trust / Ramón Hermoso, Holger Billhardt, Sascha Ossowski / 10.2
490 / Solving Identical Payoff Bayesian Games with Heuristic Search / Frans Oliehoek, Matthijs Spaan, Jilles Dibangoye, Christopher Amato / 18.2
491 / Multiagent Resource Allocation with Sharable Items: Simple Protocols and Nash Equilibria / Stephane Airiau, Ulle Endriss / 3.2
492 / Decentralized Hash Tables For Mobile Robot Teams Solving Logistics Tasks / Dali Sun, Alexander Kleiner, Christian Schindelhauer / 22.3
499 / History-Dependent Graphical Multiagent Models / Quang Duong, Michael Wellman, Satinder Singh, Yevgeniy Vorobeychik / 25.2
506 / Learning Multirobot Joint Action Plans from Simultaneous Task Execution Demonstrations / Murilo Martins, Yiannis Demiris / 22.4
508 / Multi-Target Adaptive A* / Kengo Matsuta, Hayato Kobayashi, Ayumi Shinohara / 21.2
509 / Coalition Formation with Spatial and Temporal Constraints / Sarvapali Ramchurn, Maria Polukarov, Alessandro Farinelli, Cuong Truong, Nick Jennings / 24.4
512 / Using spatial hints to improve policy reuse in a reinforcement learning agent / Bruno da Silva, Alan Mackworth / 6.2
514 / Emotions to Control Agent Deliberation / Bas Steunebrink, Mehdi Dastani, John-Jules Meyer / 19.3
521 / Generalized Fringe-Retrieving A* for Unmanned Ground Vehicle Navigation / Xiaoxun Sun, William Yeoh, Sven Koenig / 27.5
527 / Local search for Distributed Asymmetric Optimization / Alon Grubshtein, Tal Grinshpoun, Amnon Meisels, Roie Zivan / 20.2
529 / Incremental Plan Aggregation for Generating Policies in MDPs / Florent Teichteil-Konigsbuch, Ugur Kuter, Guillaume Infantes / X.3
535 / Coordination of Agent Schedules using Distributed Neighbor Exchange / James Atlas, Keith Decker / 20.1
542 / Influence of different execution models on patrolling ants behavior : from agents to robots / Arnaud Glad, Olivier SIMONIN, Olivier Buffet, Charpillet François / 24.3
543 / Collective Decision-Making in Multi-Agent Systems by Implicit Leadership / Chih-Han Yu, Justin Werfel, Radhika Nagpal / 24.5
550 / A Logical Framework for Prioritized Goal Change / Shakil Khan, Yves Lesperance / 5.4
551 / Collaborative Foraging using Beacons / Brian Hrolenok, Sean Luke, Keith Sullivan, Christopher Vo / 24.6
553 / A Probabilistic Model for Trust and Reputation / George Vogiatzis, Ian MacGillivray, Maria Chli / 10.3
566 / Establishing Spatially Targeted Communication in a Heteregeneous Robot Swarm / Nithin Mathews, Anders Christensen, Eliseo Ferrante, Rehan O\\\'Grady, Marco Dorigo / 22.5
567 / A Distributed Algorithm for Anytime Coalition Structure Generation / Tomasz Michalak, Jacek Sroka, Talal Rahwan, Peter McBurney, Michael Wooldridge, Nick Jennings / 21.6
570 / Model checking detectability of attacks in multiagent systems / Ioana Boureanu, Mika Cohen, Alessio Lomuscio / 14.5
573 / Strategic Executions of Choreographed Timed Normative Multi-Agent Systems / Lacramioara Astefanoaei, Frank S. de Boer, Mehdi Dastani / 19.2
575 / A Graph-Theoretic Approach to Protect Static and Moving Targets from Adversaries / Gerardo Simari, John Dickerson, V.S. Subrahmanian, Sarit Kraus / 5.6
577 / Improving the Performance of Complex Agent Plans Through Reinforcement Learning / Matteo Leonetti, Luca Iocchi / 17.3
581 / Coalition Structure Generation in Multi-Agent Systems with Mixed Externalities / Bikramjit Banerjee, Landon Kraemer / 3.3
589 / Point-Based Backup for Decentralized POMDPs: Complexity and New Algorithms / Akshat Kumar, Shlomo Zilberstein / 25.4
592 / On the Complexity of Coalition Formation Problems with a Bounded Number of Agent Types / Tammar Shrot, Yonatan Aumann, Sarit Kraus / 16.1
597 / Towards Agents that Understand Organizations: A Semantic Approach / M. Birna van Riemsdijk, Koen Hindriks, Catholijn Jonker, Maarten Sierhuis / 15.3
601 / Agent Based Information Aggregation / Efthimios Bothos, Dimitris Apostolou, Gregoris Mentzas / 8.6
604 / Computing Equilibria by Incorporating Qualitative Models / Sam Ganzfried, Tuomas Sandholm / 3.4
606 / Deception in Networks of Mobile Sensing Agents / Viliam Lisý, Roie Zivan, Katia Sycara, Michal Pechoucek / 20.4
610 / Strategy Generation in Multi-Agent Imperfect-Information Pursuit Scenarios / Eric Raboin, Dana Nau, Ugur Kuter, Satyandra K. Gupta, Petr Svec / 22.6
623 / Exploiting Domain Knowledge to Improve Norm Synthesis / George Christelis, Michael Rovatsos, Ronald Petrick / 15.4
625 / Reasoning about Strategies of Agent Programs / Mehdi Dastani, Wojciech Jamroga / 19.6
630 / Evolving Policy Geometry for Scalable Multiagent Learning / David D\\\'Ambrosio, Joel Lehman, Sebastian Risi, Kenneth Stanley / 17.4
632 / An Integrated Possibilistic Framework for Goal Generation in Cognitive Agents / Célia da Costa Pereira, Andrea Tettamanzi / 25.5
633 / Model Checking ATL+ Is Harder than It Seemed / Nils Bulling, Wojciech Jamroga / 14.6
644 / Self-Organization for Coordinating Decentralized Reinforcement Learning / Chongjie Zhang, Victor Lesser, Sherief Abdallah / 17.5
645 / Hybrid Transitive-Trust Mechanisms / Jie Tang, Sven Seuken, David Parkes / 10.4
651 / Bootstrapping Trust Evaluations through Stereotypes / Chris Burnett, Timothy Norman, Katia Sycara / 10.5
653 / Combining Manual Feedback with Subsequent MDP Reward Signals for Reinforcement Learning / W. Bradley Knox, Peter Stone / X.1
661 / Argumentative Alternate Offers / Nabila Hadidi, Yannis Dimopoulos, Pavlos Moraitis / 8.5
668 / Agreeing on Plans Through Iterated Disputes / Alexandros Belesiotis, Michael Rovatsos, Iyad Rahwan / 16.2
669 / Narrative Generation through Characters Point of View / Julie Porteous, Marc Cavazza, Fred Charles / 26.6
670 / OurAgent: a Champion Bidding Agent for Ad Auctions / David Pardoe, Doran Chakraborty, Peter Stone / 26.3
677 / Success, strategy and skill: an experimental study / Christopher Archibald, Alon Altman, Yoav Shoham / 22.5
697 / Exploiting Scale Invariant Dynamics for Efficient Information Propagation in Large Teams / Robin Glinton, Paul Scerri, Katia Sycara / 20.5
698 / Basis Function Construction for Hierarchical Reinforcement Learning / Sarah Osentoski, Sridhar Mahadevan / 17.6
711 / Linear Options / Jonathan Sorg, Satinder Singh / Y.1
713 / How Multiple Current Users React to a Quiz Agent Attentive to the Dynamics of their Participation / Huang Hung-Hsuan, Takuya Furukawa, Hiroki Ohashi, Aleksandra Cerekovic, Igor Pandzic, Yukiko Nakano, Toyoaki Nishida / 26.4
727 / Evaluating Directorial Control in a Character-Centric Interactive Narrative Framework / Mei Si, Stacy Marsella, David Pynadath / 26.5
736 / Generalized Solution Techniques for Decoupled Constraint Optimization Problems / James Boerkoel, Ed Durfee, Keith Purrington / 5.5
739 / Evaluating Models of Speaker Head Nods for Virtual Agents / Jina Lee, Zhiyang Wang, Stacy Marsella / 26.1
742 / Pure Nash Equilibria: Complete Characterization of Hard and Easy Graphical Games / Albert Xin Jiang, MohammadAli Safari / 3.6
757 / Automated Negotiation with Decommitment for Dynamic Resource Allocation in Cloud Computing / Bo An, Victor Lesser, David Irwin, Michael Zink / 19.4
766 / Assignment Problem in Requirement Driven Agent Collaboration and its Application Tool / Jian Tang, Zhi Jin / 15.5
775 / Distributed Coordination of Mobile Agent Teams: The Advantage of Planning Ahead / Laura Barbulescu, Zachary Rubinstein, Stephen Smith, Terry Zimmerman / 28.1
777 / Developing High-level Cognitive Functions for Service Robots / Xiaoping Chen, Jianmin Ji, Jiehui Jiang, Guoqiang Jin, Feng Wang, Jiongkun Xie / 19.5
786 / Reciprocal Collision Avoidance for Virtual Agents / Stephen Guy, Ming Lin, Dinesh Manocha / 26.2
790 / Joint Process Games: From Thermostats to Wikis / Michael Munie, Yoav Shoham / 15.6
798 / Parasocial Consensus Sampling: Combining Multiple Perspectives to Learn Virtual Human Behavior / Lixing Huang, Louis-Phillippe Morency, Jonathan Gratch / 26.3 Now Y.3
803 / Internal Implementation / Ashton Anderson, Yoav Shoham, Alon Altman / 3.5
805 / Agents Towards Vehicle Routing Problems / Jiri Vokrinek, Antonin Komenda, Michal Pechoucek / 27.6
841 / Infinite order Lorenz dominance for fair multiagent optimization / Boris Golden, Patrice Perny / Agreement Technologies::Collective decision making ** Economic paradigms::Social choice and voting
List of Accepted Short Papers
ID / Title / Authors6 / Emotional Eye Movement Markup Language for Virtual Agents / Zheng Li, Xia Mao
17 / Incentive Analysis of Approximately Efficient Allocation Algorithms / Yevgeniy Vorobeychik, Yagil Engel
22 / Parameterizing the Winner Determination Problem for Combinatorial Auctions / David Loker, Kate Larson
23 / An Investigation of Representations of Combinatorial Auctions / David Loker, Kate Larson