We invite you to participate in the Second International Conference on Online Social Networks (COSN). We have some great papers accepted this year http://cosn.acm.org/2014/program.html (list given below). We look forward to seeing you in Dublin! 

I knew they clicked when I saw them with their friends 
Arthi Ramachandran (Columbia University), Augustin Chaintreau (Columbia University) 

Price Trade-offs in Social Media Advertising 
Milad Eftekhar (University of Toronto), Saravanan Thirumuruganathan (University of Texas at Arlington), Gautam Das (University of Texas at Arlington), Nick Koudas (University of Toronto) 

Application Impersonation: Problems of OAuth and API Design in Online Social Networks 
Pili Hu (Department of Information Engineering, The Chinese University of Hong Kong), Ronghai Yang (Department of Information Engineering, The Chinese University of Hong Kong), Yue Li (Department of Computer Science, College of William and Mary), Wing Cheong Lau (Department of Information Engineering, The Chinese University of Hong Kong) 

Computing Classic Closeness Centrality, at Scale 
Edith Cohen (Microsoft Research), Daniel Delling (Microsoft Research), Thomas Pajor (Microsoft Research), Renato F. Werneck (Microsoft Research) 

Estimating Heights from Photo Collections: A Data-Driven Approach 
Ratan Dey (New York University), Madhurya Nangia (New York University), Keith W. Ross (New York University), Yong Liu (New York University) 

On the Internet, nobody knows you’re a dog: A Twitter Case Study of Anonymity in Social Networks 
Sai Teja Peddinti (New York University, Department of Computer Science and Engineering), Keith W. Ross (New York University, Department of Computer Science and Engineering), Justin Cappos (New York University, Department of Computer Science and Engineering) 

Invite Your Friends and Get Rewards: Dynamics of Incentivized Friend Invitation in KakaoTalk Mobile Games 
Jiwan Jeong (KAIST), Sue Moon (KAIST) 

Partisan Sharing: Facebook Evidence and Societal Consequences 
Jisun An (Qatar Computing Research Institute), Daniele Quercia (Yahoo Research, Barcelona), Jon Crowcroft (University of Cambridge) 

Online Privacy as a Collective Phenomenon 
Emre Sarigol (ETH Zurich), David Garcia (ETH Zurich), Frank Schweitzer (ETH Zurich) 

Cognitive disconnect: Understanding Facebook Connect login permissions 
Nicky Robinson (Princeton University), Joseph Bonneau (Princeton University) 

Spreading Rumours without the Network 
Pawel Brach (University of Warsaw), Alessandro Epasto (Sapienza University of Rome), Alessandro Panconesi (Sapienza University of Rome), Piotr Sankowski (University of Warsaw) 

Ranking Twitter Discussion Groups 
James Cook (UC Berkeley), Abhimanyu Das (Microsoft Research), Krishnaram Kenthapadi (Microsoft Research), Nina Mishra (Microsoft Research) 

Analysis of the semi-synchronous approach to large-scale parallel community finding 
Erika Duriakova (UCD Insight Centre for Data Analytics), Neil Hurley (UCD Insight Centre for Data Analytics), Deepak Ajwani (Bell Laboratories, Dublin, Ireland), Alessandra Sala (Bell Laboratories, Dublin, Ireland) 

Measurement and Analysis of OSN Ad Auctions 
Yabing Liu (Northeastern University), Chloe Kliman-Silver (Brown University), Robert Bell (AT&T Labs--Research), Balachander Krishnamurthy (AT&T Labs--Research), Alan Mislove (Northeastern University) 

Mining Democracy 
Vincent Etter (EPFL), Julien Herzen (EPFL), Matthias Grossglauser (EPFL), Patrick Thiran (EPFL) 

Beyond CPM and CPC: Determining the Value of Users on OSNs 
Diego Saez-Trumper (Univ. Pompeu Fabra), Yabing Liu (Northeastern University), Ricardo Baeza-Yates (Yahoo! Labs), Balachander Krishnamurthy (AT&T Labs--Research), Alan Mislove (Northeastern University) 

The Socio-monetary Incentives of Online Social Network Malware Campaigns 
Ting-Kai Huang (Google), Bruno Ribeiro (Carnegie Mellon University), Harsha V. Madhyastha (University of California Riverside), Michalis Faloutsos (University of New Mexico) 

Role of Conformity in Opinion Dynamics in Social Networks 
Abhimanyu Das (Microsoft Research), Sreenivas Gollapudi (Microsoft Research), Arindam Khan (Georgia Tech), Renato Paes Leme (Google) 

Inferring Coarse Views of Connectivity in Very Large Graphs 
Reza Motamedi (University of Oregon), Reza Rejaie (University of Oregon), Daniel Lowd (University of Oregon), Walter Willinger (Niksun, Inc.,), Roberto Gonzalez (UC3M, Madrid) 

"WTF, GPU! Computing Twitter's Who-To-Follow on the GPU" 
Afton Geil (UC Davis), Yangzihao Wang (UC Davis), John Owens (UC Davis) 

Simultaneous Detection of Communities and Roles from Large Networks 
Yiye Ruan (Ohio State University), Srinivasan Parthasarathy (Ohio State University) 

Modeling Non-Progressive Phenomena for Influence Propagation 
Vincent Yun Lou (Stanford University), Smriti Bhagat (Technicolor), Laks V. S. Lakshmanan (University of British Columbia), Sharan Vaswani (University of British Columbia) 

Popularity Dynamics of Foursquare Micro Reviews 
Marisa Vasconcelos (Universidade Federal de Minas Gerais), Jussara Almeida (Universidade Federal de Minas Gerais), Marcos Gonçalves (Universidade Federal de Minas Gerais), Daniel Souza (Universidade Federal de Minas Gerais) 

It's the Way you Check-in: Identifying Users in Location-Based Social Networks 
Luca Rossi (University of Birmingham, UK), Mirco Musolesi (University of Birmingham, UK) 

Fighting Authorship Linkability with Crowdsourcing 
Mishari Almishari (King Saud University), Ekin Oguz (University of California Irvine), Gene Tsudik (University of California Irvine)