Except where exchange involves the Authority, there is a generally-unregulated free market.

But the most heated exchanges involved the closing of the engine companies.

A mutual exchange may involve more than two tenants.

One exchange that did not make it into my piece involved Michael Jackson.

At first, the officers said, the exchanges will involve 10 to 12 cadets for about two weeks each.

The exchanges involved in-college tuition and work placements with local companies.

The exchange would involve real estate, supplies of various kinds, and defense.

These exchanges of information usually did not involve overt inside tips.

The exchange eventually involved other members of the audience and was calmed only when the film resumed.

But the whole exchange involved far more than a friendly neighbor welcoming the new folks on the block.