Table 2 Number of included articles by study design and data source
Study design | Total | Data source | |||
|---|---|---|---|---|---|
Governmental/organisational data | Secondary sources | Interviews/surveys | Direct observation | ||
BA | 8 | 8 | 3 | 0 | 0 |
BACI | 5 | 5 | 1 | 0 | 0 |
CI | 15 | 5 | 4 | 6 | 4 |
Descriptive case study | 14 | 9 | 10 | 7 | 2 |
Model | 5 | 3 | 1 | 0 | 2 |
Descriptive analysis | 12 | 4 | 10 | 6 | 1 |
Statistical analysis | 1 | 1 | 0 | 0 | 0 |
Theoretical analysis | 2 | 0 | 2 | 2 | 1 |
Value chain analysis | 1 | 0 | 1 | 1 | 1 |