Supermarkets often publish upcoming sale prices in advance, and matching your competitor’s prices is not collusion. On the contrary, it’s a sign of healthy competition!
If supermarkets are getting together and forming handshake agreements like “we will not change prices between November and February”, like Canadian supermarkets apparently did, then that could constitute collusion.
If supermarkets are getting together and forming handshake agreements like “we will not change prices between November and February”, like Canadian supermarkets apparently did, then that could constitute collusion.