For example, they may insist on a guarantee that the licensor owns the rights to the property, or they may include a clause prohibiting the licensor from competing directly with the licensed property in certain markets. The provision of licenses and the agencies that hire them are often criticized by libertarians like Milton Friedman for creating an anti-competitive environment for professions that creates a barrier to entry for more skilled and skilled people who may not have the resources to obtain the necessary licenses. According to Friedman, licenses and permits have become so cumbersome because of legislation favoring the current settlement of wealthy residents that they reduce the supply of these professions, raising prices for the average consumer. .