Online reputation systems collect, maintain and disseminate reputations as a summary numerical score of past interactions of an establishment with its users. As reputation systems, including web search engines, gain in popularity and become a common method for people to select sought services, a...

A new and fast learning method is described in the context of teaching a program to play chess. A theory of the meaning of a position evaluation is developed, and is then confronted with a large collection of games played by masters or other programs. The program learns by fitting its evaluation...

Market share and quality, or customer satisfaction, go hand in hand. Yet the inference that higher market share indicates higher quality is seldom made. The skepticism is in part fueled by elitism, the association of mass popularity with lower quality, and by cynicism, ascribing market...