| Recruitment | Selection |
---|---|---|
Single channel across two stages | Formal | Formal |
 | Informal | Informal |
Joint channel between two stages | Formal | Informal |
 | Informal | Formal |
Joint channel within two stages | Formal + Informal | Formal |
 | Formal + Informal | Informal |
 | Formal | Formal + Informal |
 | Informal | Formal + Informal |
 | Formal + Informal | Formal + Informal |