MRP is about the demand for labour, not the supply
MRP = Marginal Revenue Product.
MRP = MPP * MR
MRP depends on the productivity of workers and Price (marginal revenue) of the good produced. Therefore, Labour demand is a derived demand.
Wages are determined by both demand (MRP) and Supply.
- Supply of labour depends on things like
- number of qualified workers
- Time taken for qualifications
- Non monetary benefits e.t.c