A company or works where some grades of worker are required to belong to a recognized trade union; the opposite situation is known as an open shop. Unions prefer the closed shop, as it gives them more members, and gives their members a better chance of getting any available jobs. They also feel that non-members benefit from agreements on pay and working conditions, and that it is unfair for them not to share in the costs of achieving them. Employers accept the closed shop for the sake of industrial peace, though they know it weakens their bargaining position in the event of an industrial dispute. Some workers resist union membership on conscientious grounds; others because they do not think the benefits of union membership are worth the subscription. Closed shops are banned in many US states.