An efficient market doesn’t have price competition because MR=MC. Price above the margin and nothing sells. Price below and you’re losing money-and no one has m

An efficient market doesn’t have price competition because MR=MC. Price above the margin and nothing sells. Price below and you’re losing money-and no one has money to lose for market power. I realize I’m talking about markets people would have a difficult time looking for examples. This illustrates how wide spread concentration is. I’m not concerned with the N=M inflection points.