Most airport operators in the hub competition are seeking to secure high level of service to passengers. They allow concessionaires to provide various services to passenger by contracting with concessionaires including duty free shops and restaurants. An airport operator needs to manage the network with them to ensure that passengers are satisfied with the service quality and that prices and quality are competitive with those of neighboring airports. The effects of interaction between the two mediating variables - trust by the bilateral governance mechanism and influence by the unilateral governance mechanism - are hypothesized to have a positive impact on long-term orientation and forbearance of opportunistic behaviors. The pure hub type airport operators are found to monitor concessionaires more than the Incheon Airport operator does. There is no significant difference in the other unilateral governance mechanism between the two types of airports. The result of the analysis discovered that the interaction effects between trust by the bilateral governance mechanism and influence by the unilateral governance mechanism are not significant in having an impact on long-term orientation and forbearance of opportunistic behaviors. However, since both trust and influence have positive influence on long-term orientation and forbearance of opportunistic behaviors, it can be inferred that the integral type of governance type in which both bilateral and unilateral governance mechanism are adopted simultaneously is adequate.