How servant leadership and self-efficacy interact to affect service quality in the hospitality industry: A polynomial regression with response surface analysis

This paper aimed to investigate how perceived servant leadership and employees' self-efficacy interact with each other to affect employees' service quality in the hospitality industry. We methodologically employed polynomial regression equation with response surface analysis. There were two studies in this paper. The data of the first study were obtained from front-line employees at a restaurant chain. A total of 673 employees provided valid data. The data of the second study were collected from front-line employees at five-star hotels. The sample consisted of 317 participants. Both studies yielded similar patterns and results. It was demonstrated that self-efficacy moderates the relationship between servant leadership and service quality, and employees' service quality was higher when both perceived level of servant leadership and self-efficacy were higher. The resulted also showed that the larger the difference between perceived level of servant leadership and self-efficacy, the higher employees' service quality. •Self-efficacy moderates the relationship between perceived servant leadership and service quality.•Employees’ service quality is higher when both perceived servant leadership and self-efficacy are higher.•The larger the difference between the level of perceived servant leadership and self-efficacy, the higher service quality.