WASHINGTON (Reuters) - If U.S. antitrust enforcers decide to challenge the proposed $45 billion merger of Comcast Corp and Time Warner Cable Inc, it may be because of an idea with a funny-sounding ...

The dangers of monopolies and trusts have long been clear. A company or an allied group that controls most sales of a good or service can use that power to set prices at an arbitrarily high level.

Over the past several years, policy makers and economists have increasingly voiced concerns about apparent labor-market monopsonies—markets in which employers have the power to set wages—in certain ...