The Game of Oligopoly and A New Mexico

Tim Wu explains why media oligopolies are as dangerous as monopolies. Andrés Martinez talks to Alfredo Corchado, the Mexico bureau chief of The Dallas Morning News in Mexico City, about Mexico's forward momentum. Read more from Alfredo Corchado on his personal relationship with Ciudad Juárez, Mexico.

Andrés Martinez also writes on President Obama's trip to Mexico, and our changing relationship with our southern neighbor, in BusinessWeek.