Level-impact: the predominant level at which wage bargaining takes place in terms of coverage.

1. Bargaining predominantly takes place at central or cross-industry level negotiated at lower levels.
2. Intermediate or alternating between central and industry bargaining.
3. Bargaining predominantly takes place at the sector or industry level.
4. Intermediate or alternating between sector and company bargaining.
5. Bargaining predominantly takes place at the local or company level.