We empirically investigate the platform competition in the online daily deals promotion market that is characterized by intense rivalry between two leading promotion sites, Groupon and LivingSocial, that broker between merchants and consumers. We find that deals offered through Groupon, the...

In this paper, motivated by previous research works on the evolution of the network topology, i.e., the combination of preferential attachment and temporal effect (aging of vertices), we propose a novel model which combines the mixed attachment mechanisms (preferential attachment and uniform...