Economic Polices

collusin is rare in oiligopoly industries because the dominant has nothing to gain from rival ? price leadership in oiligopoly occurs where one firm sets a price for the product and other firms are not allowed to charge more than this true or flase ? oligopolies are likely to occur when the significant barrier to entry? if there are large economic of scale a monopoly industry may produce more output and charge lower price than does a perfectly competiitve industry true or flase ? a discrimating monopolist can charge diffrent prices only if price elasticity demand in each market is diffrent true or flase ? excess profit may presist in oiligopolies even in the long run true or flase ? collusion is rare oiligpoly because the dominant companies has nothing to gain from rivals true or false ?