supply & demand of labour

All the following are examples of costs of employing labour except

All of the following will increase demand for labour except

Which one of the following is a substitute for labour ?

The demand for labour is affected by all of the following except

Demand determined by the demand for goods and services supplied by the labour is known as

All of the following will shift the supply curve for labour except

Best definition of ageing population is

The productivity of labour is

All of the following will increase the supply of labour except

The price of labour is