Media

The concentration of private power over media has been the subject of intense public debate around the world. Critics have long feared waves of mergers creating a handful of large media firms that would hold sway over public opinion and endanger democracy and innovation. But others believe with equal fervor that the Internet and deregulation have opened the media landscape significantly. How concentrated has the American information sector really become? What are the facts about American media ownership?

We propose a framework for designing adaptive choice-based conjoint questionnaires that are robust to response error. It is developed based on a combination of experimental design and statistical learning theory principles. We implement and test a specific case of this framework using Regularization Networks. We also formalize within this framework the polyhedral methods recently proposed in marketing.

Peer-to-Peer (P2P) is a communication structure in which individuals interact directly, without going through a centralized system. The implications of this architecture go far beyond the technological realm; the ability of individuals to share digital content files, including audio and video material, in real time, facilitates communication and, at a deeper cultural level, promotes community without hierarchy or strict control.

he Internet is not simply a set of interconnected links and protocols---it is also a construct of the imagination, an inkblot test into which everyone projects their desires, fears, and fantasies. Some see enlightenment and education. Others see pornography and gambling. Some see sharing and collaboration. Others see spam and viruses. Yet when it comes to the impact on the democratic process, the answer seems unanimous. The Internet is good for democracy. It creates digital citizens active in the teledemocracy [1] of the Electronic Republic [2] in the e-nation [3].

This essay analyzes the long-term lessons of the recent upturn and downturn in the telecommunications industry. It concludes that volatility and cyclicality will be an inherent part of the telecom sector in the future. To deal with such instabilities, companies and investors seek consolidation and cooperation. Government, too, is likely to stress stability more than before. Hence, an oligopoly is likely to emerge as the equilibrium market structure, and with it some regulation.

Two Columbia Business School students have developed an idea for a shoe accessory. They believe that this product will sell and want to set up a company. What marketing-related questions should they address in order to increase their chance of success?

Here's a familiar story: A new communications technology that allows one to broadcast live to millions.

We model the commercial World Wide Web as a directed graph that emerges as the equilibrium of a game in which utility maximizing websites purchase (advertising) in-links from each other while also setting the price of these links. In equilibrium, higher content sites tend to purchase more advertising links (mirroring the Dorfman-Steiner rule) while selling less advertising links themselves.