Multiple competitors just results in them all agreeing to raise prices when taxes are lowered.
Price signalling happens in situations with low competition, in a healthy, competitive market, if you raises prices someone will undercut you to take your business.
Out of curiosity, how do you propose increasing the number of competitors? Or is this a situation of “gee, that would be nice. Oh well, I guess nothing can be done.”?
You literally just break up grocery store companies and stop them from merging in the future. The solution is not complicated.
Yeah. Try and follow the conversation.