抄録
The demand for tourism is a non-elastic demand and a minimum necessity in the life, and is uncontrolable. Even in case of the income decrease at economy crisis, people manage to appropriate their money for the expenditure of tourism and leisure by cutting the expenditure of food, drink, clothes, furniture and houses.
When the economy in Western Europe was at crisis in and after 1973, the demand for tourism did not decrease but constantly increased.
Since the working time will be decreased more and more and the leisure time will be increased at the end of this century, tourism industries would be in boom and become global economic activities for the first time.
