Economists use the term demand to refer to a schedule of various combinations of market prices and amounts demanded.
Utility
They use percentage change because of the nature of the unit being described. The elasticity of demand specifies how much percentage demanded changes in response to a 1% increase in price.
Scarcity is the result of having too little of a product to meet the demand for it.
You could use a demand chart to estimate this.
The negative incentive will cause consumers to purchase less of a good or service if it is of lower quality
Utility
Adam Smith
They use percentage change because of the nature of the unit being described. The elasticity of demand specifies how much percentage demanded changes in response to a 1% increase in price.
Practical limits on spending. You have enough money to buy one or the other, but not both.
Geographers use the term hemisphere to refer to half of the earth. Examples of this would be the Northern and Southern Hemisphere.
Scholars use the term sex to refer to biological differences between men and women.
I can not think of any special term . Sometimes the term "dead presidents' is used to refer to money.
Those are 'meridians'.
wi-fi
Economists use math to calculate statistics in sales and business profits. Economists also use math to predict trends in supply and demand.
They use the term Eurasia.
Archaeologists refer to the society centered at Shiloh as the Israelite society.