In another high-level departure, Susan Herbert, the editorial page editor, resigned last week.

Turner Broadcasting announced several management changes, including some high-level departures.

The computer maker also announced the second high-level departure in a week.

There were high-level departures, and there was dissention among the news staff.

Ms. Johnson, 49, who is a member of the firm's management committee, is the second high-level departure at the firm recently.

The resignation is the latest in a string of high-level departures at the company, which reported disappointing earnings growth last year.

But they follow a number of other high-level departures.

A string of high-level departures, meanwhile, has raised eyebrows.

The reining in of authority has already caused some high-level departures from the regional brokerages.

Ms. Johnson, left, who is a member of the firm's management committee, is the second high-level departure at the firm in recent weeks.