The No Surcharge Rule (NSR) prevents merchants from charging more to consumers who pay by card versus other means ("cash"). We consider a payment network facing local monopolist merchants that serve two consumer groups, card users and cash users. Unlike in prior work, transaction quantities are...

The U.S. telecom industry has long been evolving from regulated monopoly to competition in various services such as telephony and video. This trend is accelerating with the spread of digital transmission and the Internet. Digital Crossroads provides a timely and sweeping treatment of the entire...

"Network neutrality" encompasses a wide-ranging debate over what limits, if any, should be placed on network providers in pricing or managing Internet traffic. The articles in this volume tackle various aspects of this debate: Have other transportation networks been truly "neutral"? Should...