This week, the House Judiciary Committee announced a bipartisan investigation into antitrust violations by big tech companies like Amazon, Apple, Facebook and Google. Both the Justice Department and the Federal Trade Commission are also considering their own investigations into these companies.

A number of Democratic Presidential candidates including Sens. Elizabeth Warren, Amy Klobuchar and Bernie Sanders are proposing more oversight of the tech industry and possible breakup of some big companies.

Hiawatha Bray, technology writer for the business section of The Boston Globe. He tweets @globetechlab.