This policy was explicitly endorsed by the publishers association at its recent annual meeting.
Indeed, the publishers association and other trade and professional organizations are feeling the pinch.
That organization, known as the Four A's, is the agency industry counterpart of the publishers association.
Tom Mckee, a statistician at the publishers association, has few illusions.
The Publishers Association does not see the damage as terminal, and is planning an amended agreement.
He had been the head of the Lebanese Publishers Association from 1967 until his murder.
There was some scepticism at the Publishers Association about the likely extent of the breach.
Britons bought 12.7m ebooks in the first half of 2011, according to the Publishers Association.
The seven-day-a-week paper has a circulation of 68,000, mostly in the New York metropolitan region, according to the publishers association.
Mr. Sulzberger will head the publishers association until after next year's annual convention in Chicago.