In economics, 'economic rent' refers to the payment made to a factor of production that exceeds the minimum amount necessary to keep that factor in its current use. Since factors in perfectly inelastic (fixed) supply, such as land, have no alternative use, the entire payment they receive is considered economic rent, as the supply would remain the same regardless of the price.

While the total supply of land is fixed (perfectly inelastic), the supply of land for a specific use is not. As the value or rent of land in a particular use increases, it becomes more profitable to convert land from other uses to this specific use. Therefore, the supply curve for land in a specific use is upward sloping, reflecting the opportunity cost of alternative land uses.

In a market economy, land is allocated to its most efficient use through the price mechanism. The equilibrium between the demand for land by various sectors and the available supply determines the rental price. Land will naturally be allocated to the uses that can afford the highest rent, which reflects the highest marginal productivity or utility of that land in that specific use.

Economic rent is the surplus payment made to a factor of production over and above the minimum amount necessary to keep that factor in its current use. If a resource is perfectly inelastic in supply, the entire payment received is considered economic rent. This concept is distinct from normal profit or wages, as it represents a return that does not influence the supply of the resource.