List of accepted papers for EC 2011: Multilateral Matching John Hatfield, Scott Kominers A Revealed Preference Approach to Computational Complexity in Economics Federico Echinique, Daniel Golovin, Adam Wierman The college admissions problem with a continuum of students Jacob Leshno, Eduardo Azevedo Non-linear Price Competition and a Common Agency with Informed Principals Hamid Nazerzadeh, Georgia Perakis Mechanisms for Multi-Level Marketing Yuval Emek, Ron Karidi, Moshe Tennenholtz, Aviv Zohar Reserve Prices in Internet Advertising Auctions: A Field Experiment Michael Ostrovsky, Michael Schwarz An Optimization-Based Framework for Automated Market-Making Jacob Abernethy, Yiling Chen, Jennifer Wortman Vaughan Yield Optimization of Display Advertising with Ad Exchange Balseiro Santiago, Jon Feldman, Vahab Mirrokni, S. Muthukrishnan Selling Privacy at Auction Arpita Ghosh, Aaron Roth A Game-Theoretic Analysis of Rank-Order Mechanisms for User-Generated Content Arpita Ghosh, Patrick Hummel Polynomial-time Computation of Exact Correlated Equilibrium in Compact Games Albert Xin Jiang, Kevin Leyton-Brown Implementing Efficient Graphs in Connection Networks Ruben Juarez, Rajnish Kumar Network Formation in the Presence of Contagious Risk Larry Blume, David Easley, Jon Kleinberg, Robert Kleinberg, Eva Tardos Simplicity-Expressiveness Tradeoffs in Mechanism Design Paul Duetting, Felix Fischer, David Parkes The Effects of Exposure Time on Memory of Display Advertisements Daniel Goldstein, R. Preston McAfee, Siddharth Suri Economies with Non-Convex Production and Complexity Equilibria Christos Papadimitriou, Christopher Wilkens Concordance among Holdouts Scott Kominers, E. Glen Weyl Multi-Unit Auctions: Beyond Roberts Shahar Dobzinski, Noam Nisan Non-Price Equilibria in Markets of Discrete Goods Avinatan Hassidim, Haim Kaplan, Yishay Mansour, Noam Nisan Best-Response Auctions Noam Nisan, Michael Schapira, Gregory Valiant, Aviv Zohar Single Valued Combinatorial Auctions with Budgets Amos Fiat, Stefano Leonardi, Jared Saia, Piotr Sankowski Optimal Cost Sharing Protocols for Scheduling Games Philipp von Falkenhausen, Tobias Harks Truth, Envy, and Profit Jason Hartline, Qiqi Yan Pseudorandom Financial Derivatives David Zuckerman Strategic Sequential Voting in Multi-Issue Domains and Multiple-Election Paradoxes Lirong Xia, Vincent Conitzer, Jerome Lang Axiomatic Attribution for Multilinear Functions Yi Sun, Mukund Sundararajan Stochastic Variability in Sponsored Search Auctions: Observations and Models Furcy Pin, Peter Key Role of Social Networks in Online Shopping: Information Passing, Price of Trust, and Consumer Choice Stephen Guo, Mengqiu Wang, Jure Leskovec GSP Auctions with Correlated Types Brendan Lucier, Renato Paes Leme Hiring a Secretary from a Poset Ravi Kumar, Silvio Lattanzi, Sergei Vassilvitskii, Andrea Vattani Liquidity in Credit Networks: A Little Trust Goes a Long Way Pranav Dandekar, Ashish Goel, Ramesh Govindan, Ian Post Multi-Keyword Sponsored Search Peerapong Dhangwatnotai Repeated Matching Pennies with Limited Randomness Michele Budinich, Lance Fortnow Mechanisms for Complement-Free Procurement Shahar Dobzinski, Christos Papadimitriou, Yaron Singer Bayesian Mechanism Design for Budget-Constrained Agents Shuchi Chawla, David Malec, Azarakhsh Malekian Distributed Algorithms and New Convex Programs for Fisher Markets with Linear and Spending Constraint Utilities Benjamin Birnbaum, Nikhil Devanur, Lin Xiao Who Moderates the Moderators? Crowdsourcing Abuse Detection in User-generated Content Arpita Ghosh, Satyen Kale, R. Preston McAfee On the efficiency of equilibria in generalized second price auctions Ioannis Caragiannis, Christos Kaklamanis, Panagiotis Kanellopoulos, Maria Kyropoulou Individual rationality and participation in large scale, multi-hospital kidney exchange Itai Ashlagi, Alvin Roth Matching with Couples Revisited Itai Ashlagi, Mark Braverman, Avinatan Hassidim Near Optimal Online Algorithms and Fast Approximation Algorithms for Resource Allocation Problems Nikhil Devanur, Kamal Jain, Balasubramanian Sivan, Christopher Wilkens Only Valuable Experts Can Be Valued Moshe Babaioff, Liad Blumrosen, Nicolas Lambert, Omer Reingold A Random Graph Model of Kidney Exchanges: Efficiency, Individual-Rationality and Incentives Toulis Panagiotis, David Parkes Mean Field Equilibria of Dynamic Auctions with Learning Krishnamurthy Iyer, Ramesh Johari, Mukund Sundararajan Money for Nothing: Exploiting Negative Externalities Changrong Deng, Sasa Pekec Optimal Auctions with Positive Network Externalities Nima Haghpanah, Nicole Immorlica, Kamesh Munagala, Vahab Mirrokni A Truthful Randomized Mechanism for Combinatorial Public Projects via Convex Optimization Shaddin Dughmi Market Making and Mean Reversion Tanmoy Chakraborty, Michael Kearns Does more connectivity help groups to solve social problems? Daniel Enemark, Mathew McCubbins, Ramamohan Paturi, Nicholas Weller