Different thinking ways should not result in hatred and discrimination instead we should learn form each other and get a better understanding.

This paper analyzes the problem of maximizing the profit of monopoly market under the consumer switching condition which extents it from perfect price discrimination and uniform price to general form.

All men or women, young or old, short or tall, should not tolerate any form of discrimination, because sooner or later we are all likely to fall victim to this dangerous practice.