Ever since the end of Medieval feudalism, and the writings of John Locke, we have understood the importance of being able to buy and sell one's own property, including books and watches, both for reasons of economics and liberty.

Anyone unhappy with Google can use other search engines - including DuckDuckGo and Blekko, along with Bing or Yahoo.

'Negative liberty' is a political science term meaning a liberty from government action. It is not a liberty to anything - like the liberty to meaningfully contribute to public debate or to have ample spaces for speech.

Congress created a safe harbor for defamation in 1996 and for copyright in 1998. Both safe harbors were designed to ensure that the Internet would remain a participatory medium of speech.

From search and books to online TV and operating systems, antitrust affects our daily digital lives in more ways than we think.

Under the Constitution, federal law trumps both state and city law. But antitrust law allows states some exceptional leeway to adopt anticompetitive business regulations, out of respect for states' rights to regulate business. This federal respect for states' rights does not extend to cities.