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A recent article in The Economist (Simmonds 2008) reports how firms that are usually described as victims of P2P piracy can benefit from those illegal activities by gaining a real-time glimpse on the consumers' music tastes and preferences. Our own interactions with industry experts have shown an ambivalent thinking regarding P2P networks. While most(More)
Over the past decade, there has been an explosion of digital services on the Internet, from Google and Wikipedia to Facebook and YouTube. However, the value of these innovations is difficult to quantify, because consumers pay nothing to use them. We develop a new framework to measure the value of free services using the insight that even when people do not(More)
We study the propagation of digital piracy in P2P networks with two population segments: seeders, who are original suppliers of files and pirates, who copy the files. Early on, seeders are the primary supply source for pirates, while later on, pirates can also function as suppliers of the file. The mixture of these two segments enables or impedes the piracy(More)
The extent of piracy for a specific digital good can be characterized by the laws of demand and supply. The music industry and its trade organization, the RIAA, have recognized this and taken aggressive steps to diminish demand as well as supply. In this study, we develop a model that describes the dynamics of demand and supply-side of piracy propagation.(More)
A facile surface-enhanced Raman scattering (SERS) sensor based on a silver-ion-mediated amplification effect was designed for the determination of glucose concentration. In this approach, 4-aminothiophenol (4-ATP) molecules assembled on the surface of a gold wafer (Au wafer@4-ATP) act not only as Raman tags but also as linkage agents. Silver nanoparticles(More)
This paper studies the mechanism of users' online activities and their implications for the firm value, and quantifies them for Internet firms that have been recently growing fast. Users collectively spend billions of person-hours creating user generated contents which is then becomes an asset that produces a stream of value for fellow users, and of course,(More)
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