Labour refers to human effort used in production which also includes technical and marketing expertise. The payment for labour (workforce) is a wage or a salary. Wage can be either in nominal value or in real value. Usually the salary or wage are marked as "w".

Labour is all human efforts, mental and physical, utilized in the production process. There are two types of labour:

Productive labour:   Is the labour which is engaged in producing goods and services and is therefore paid a reward.

Un productive labour:     Is the labour that doesn’t produce goods and service and therefore receives no reward.