Advertising once paid the bills at American newspapers. As that shifts — rapidly — how will it change the way news companies operate?

Newspapers and other publishers are realizing the value of selling something other than their primary product to readers — and ebooks are leading the way.

As more newspapers get on the paid-content bandwagon, there are a few promising models popping up. Here’s what to learn from them.

The time is quickly approaching when digital is a bigger part of traditional publishers’ businesses than print. How will we know if the crossover is happening sustainably? Here are some metrics.