Preposition: of

• religion: In contrast, in a society with a free market of religions available, there will be a high level of religious vitality.

Preposition: without

• favoritism: Where advertising is permitted, it should be an open and free market without favoritism to national advertising service suppliers.

Preposition: in

• religion: Cairncross points to the " free market in religion " in the US: " There never was a one-size-fits-all monopoly religion.