Yesterday, Federal District Judge Amit Mehta issued a ruling in the U.S. Justice Department’s antitrust case against Google in favor of the government. Judge Mehta didn’t mince words:

Google is a monopolist, and it has acted as one to maintain its monopoly. It has violated Section 2 of the Sherman Act.

The Judge further explained his ruling:

Specifically, the court holds that (1) there are relevant product markets for general search services and general search text ads; (2) Google has monopoly power in those markets; (3) Google’s distribution agreements are exclusive and have anticompetitive effects; and (4) Google has not offered valid procompetitive justifications for those agreements. Importantly, the court also finds that Google has exercised its monopoly power by charging supracompetitive prices for general search text ads. That conduct has allowed Google to earn monopoly profits.

It’s a long opinion, coming in at nearly 300 pages, but the upshot of why Judge Mehta ruled the way he did is summed up nicely near the beginning of the tome:

But Google also has a major, largely unseen advantage over its rivals: default distribution. Most users access a general search engine through a browser (like Apple’s Safari) or a search widget that comes preloaded on a mobile device. Those search access points are preset with a “default” search engine. The default is extremely valuable real estate. Because many users simply stick to searching with the default, Google receives billions of queries every day through those access points. Google derives extraordinary volumes of user data from such searches. It then uses that information to improve search quality. Google so values such data that, absent a user-initiated change, it stores 18 months-worth of a user’s search history and activity.

If you’re interested in how web search works and the business deals that drive it, the opinion is a great primer. Plus, although the details already dribbled out over the course of the 10-week trial, there are lots of interesting bits of information buried in there for anyone interested in Apple’s search deal with Google.

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