Briefly discuss and critique the implications of the kinked demand curve laced by an oligopolist

The implications behind the kinked demand curve is that market share is precious and when an increase in price by one firm occurs, it is not matched by others that easily due to elasticity being high at that level but when a decrease in price by one firm occurs, the other firms that form the oligopoly follow suit in order to not lose any market share because demand is inelastic at that point. Some criticism this model of oligopoly has faced is that it does not take into account the possibility of collusion between the oligopolistic firms. Furthermore, it offers no explanation as to how the firms find the kink to begin with.