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Hi, I’m Jamie Condliffe. Greetings from London. Here’s a look at the week’s tech news:

Big tech is about to face a reckoning. Probably.

The federal government is reportedly considering antitrust inquiries into Google, Apple, Facebook and Amazon. The Justice Department will handle Apple and Google; the Federal Trade Commission takes Facebook and Amazon. The House Judiciary’s subcommittee on antitrust also plans to investigate possible anticompetitive behavior and decide whether current antitrust laws need to be updated.

This is what vocal critics, as varied as a Facebook co-founder and Senator Elizabeth Warren, have been waiting for: the chance to hold these companies to account and use antitrust law to break them up.

But how far will the new wave of investigations go?

■ Don’t expect this to be quick. When the government went after Microsoft in the 1990s (the last major United States tech antitrust case) it took 12 years, from the first F.T.C. investigation to a court-approved settlement. The work now may be more substantial: Harry First, an antitrust law professor at New York University, said that the agencies taking on these four companies were “clearly ambitious.”