In order to fix a price with your competitor, the only thing you need is an information channel with them.
The price in itself carries information, so, I would not be surprised if in many cases not conversations are happened between the parties, but all the necessary information exchange have happened through the prices. That would be very difficult to police.
The price in itself carries information, so, I would not be surprised if in many cases not conversations are happened between the parties, but all the necessary information exchange have happened through the prices. That would be very difficult to police.