It’s a big news week for Amazon. First, it got sued by the District of Columbia on antitrust grounds. The lawsuit accuses the company of preventing sellers on its marketplace from offering better prices elsewhere. Then, in another part of its business, Amazon announced that it was acquiring one of the world’s oldest film studios, MGM, which was founded in 1924. So even as big as Amazon is, it just keeps getting bigger, but not in one single market. “Marketplace Tech” host Molly Wood speaks with Rebecca Allensworth, a law professor at Vanderbilt University. She said that makes antitrust enforcement tricky and that it reminds her of another old company: Standard Oil.

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