In contrast to the Nordic countries, there is a comprehensive use of entrance fees and other economic instruments, such as revenues from equipment rentals, payment for lodging facilities and other services, in addition to concessions and various kinds of licence permits. Accordingly, park administrations have had to rely more on revenues from tourism, such as various types of user fees. To capitalize on these revenues in the most efficient ways, fees are differentiated, e.g., by letting international visitors pay more than domestic visitors.