If tax takes a large proportion of the income of people with lower income, the tax is

The reward which accrues to labour for participating in production is

a country where labour is not sufficient to make proper use of natural resources is said to have an

one characteristics of labour is that it is

The three principal economic unit in any system are

The Malthusian theory of population does not concern itself with

The satisfaction derived from the use of a commodity is its

What must be added to variable cost to give total cost?

When population is classified according to professions, it is called