| Theoretical | 5 | USA | 19 |
| Empirical | 52 | European Union | 4 |
| Theoretical/empirical | 1 | China | 3 |
| Total | 58 | Italy | 3 |
| Type of research | | Mexico | 2 |
| Qualitative | 9 | Taiwan | 2 |
| Quantitative | 42 | England | 1 |
| Quali/Quanti | 2 | England and Wales | 1 |
| Total | 53 | Scotland - UK | 1 |
| Data collection | | Ireland | 1 |
| Secondary data/panel | 32 | UK | 1 |
| Primary data/ panel | 4 | Spain | 1 |
| Secondary data/cross section | 4 | German | 1 |
| Semi-structured interviews | 3 | Netherlands | 1 |
| Focus groups/semi-structured interviews | 3 | Russia | 1 |
| Primary data/cross section | 6 | Sweden | 1 |
| Literature review | 1 | Myanmar, Vietnam, and Thailand | 1 |
| Total | 53 | India | 1 |
| Data analysis | | Japan | 1 |
| Multivariate analysis - regression | 19 | Japan and USA | 1 |
| Logistic regression - logit/probit/tobit/multimodal | 11 | Malaysia | 1 |
| Content/discourse analysis | 8 | Thailand | 1 |
| Diff in diff | 3 | Vietnam | 1 |
| Simulation with micro-econometrics | 2 | Australia | 1 |
| ANOVA/MANOVA | 2 | New Zealand | 1 |
| Multi-methods | 1 | Ecuador | 1 |
| Exploratory factor analysis - EFA/hierarchical regression | 1 | South Korea | 1 |
| Comparative method of multi-criteria decision-making analysis | 1 | Total | 54 |
| Descriptive | 1 | Continent | |
| SEM-PLS | 1 | North America | 21 |
| Multinominal regression | 1 | Europe | 17 |
| Teste t - regression analysis OLS | 1 | Asia | 12 |
| Linear probability model and two-stage least squares model (2 SLS). | 1 | Latin America | 1 |
| Total | 53 | Oceania | 3 |
| Total | 54 |