| Research topics | Data type | Method | Number of literatures |
| Factors | questionnaire data | Empirical analysis | 4 |
| Secondary data | Empirical analysis | 0 | |
| n/a | Theoretical analysis | 3 | |
| Impacts | questionnaire data | Empirical analysis | 11 |
| Secondary data | Empirical analysis | 3 | |
| Others | n/a | Theoretical analysis | 3 |
| Total |
| 24 |