All this week, we’ve been looking at internet access, cost, infrastructure, and today, competition. Actually, the almost complete lack of competition. More than 129 million people in the U.S. only have one option for broadband. Is that a government problem or a free market problem? Molly Wood speaks to Susan Crawford, a law professor at Harvard and the author of the book “Fiber: The Coming Tech Revolution — and Why America Might Miss It.”