Tickets sales policy of two routes for two-stage fares airline are studied under the following three conditions in this paper: neither unidirectional substitution of cabin nor swapping applications is considered, only unidirectional substitution of cabin is considered, both unidirectional substitution of cabin and swapping applications are considered. We formulate the corresponding decision model and derive the optimal tickets amount and expected revenue. It shows that compared with the condition that neither unidirectional substitution of cabin nor swapping applications is considered, when only unidirectional substitution of cabin is considered, the expected optimal tickets amount and expected revenue increase; compared with the condition that only unidirectional substitution of cabin is considered, when both unidirectional substitution of cabin and swapping applications are considered, the expected optimal tickets amount and expected revenue increase.
From the perspective of generalized virtual economy, considering physical factors and non-physical factors that affect the development of service industry, a system including three terms and 14 indicators is built to evaluate the development of service industry. With K-means clustering, multiple regression and other methods, an empirical study on the factors that affect the development of regional service industry in Sichuan province is conducted. It is derived that the development of regional service industry is mainly pulled by physical factors and the impact of non-physical factors is increasing. Meanwhile, the impact factors of every region are different and the corresponding policies should be adapted.