Ke ZhangKonstantinos Pelechrinis, and Theodoros Lappas
Analyzing and Modeling Special Offer Campaigns in Location-based Social Networks.
ICWSM 2015 – (Acceptance Rate: 19%) 
Featured in Pitt NewsPittsburgh Post GazetteCommuniations of the ACM,
Pittsburgh’s NPR News StationRadio PABloomberg Business,
Pitt NewsGeoMarketingW

Theodoros LappasGeorge Valkanas, and Dimitrios Gunopulos
Efficient and Domain-Invariant Competitor Mining 
SIGKDD 2012 – (Acceptance Rate:18%)

Slides  Bibtex

Theodoros Lappas, and Evimaria Terzi
Daily-Deal Selection for Revenue Maximization 
CIKM 2012 – (Acceptance Rate: 13%)