45 Degree Line
45 Degree Line - Related Videos
01:31
Degrees of Elasticity of Supply
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2024
The elasticity of supply (Es) comes in various degrees, each depicting how responsive the quantity supplied is to changes in price. Perfectly elastic supply occurs when even the slightest price change leads to an infinite change in quantity supplied. It is represented as a horizontal supply curve. Conversely, perfectly inelastic supply means the quantity supplied remains constant regardless of price changes. This is depicted as a vertical supply curve. When Es exceeds, supply is considered...
01:25
Degrees of Elasticity of Demand
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2024
The elasticity of demand gives a systematic approach to understanding how demand for various goods responds to changes in their prices. It categorizes commodities into five different degrees based on their sensitivity to price alterations. This range demonstrates the diverse consumer behaviors and preferences that exist in the market. Understanding these degrees of elasticity helps businesses and policymakers make informed decisions about pricing strategies and policy-making.
01:28
Degrees of Elasticity of Demand and the Demand Graph
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2024
Demand curves visually represent how consumers respond to changes in prices. The elasticity of demand determines the steepness of the curve, with higher elasticity resulting in a flatter curve and lower elasticity leading to a steeper curve. Perfectly Elastic Demand: Represented by a horizontal line, indicating that any change in price results in an infinite change in quantity demanded. Although this is a theoretical extreme, it signifies a scenario where consumers are extremely sensitive to...
FAQs
Equilibrium occurs at the output level where the planned aggregate expenditure curve intersects the 45 Degree Line. At that point, the amount households, firms, and governments plan to spend matches the economy’s real output. This intersection provides a graphical way to determine national income in the Keynesian framework rather than treating output as predetermined.
A point above the 45 Degree Line indicates that planned aggregate expenditure exceeds the economy’s real output at that income level. A point below it indicates that planned spending is less than production. These gaps signal pressure for inventories and output to change, helping explain how the economy moves toward an expenditure-output intersection.
The line supplies a constant benchmark for comparing planned spending with real output across different income levels. By observing where the expenditure curve sits relative to that benchmark, analysts can identify mismatches between production and intended purchases. This makes the effects of changing spending plans easier to examine within national income determination and multiplier analysis.
First, place real output on the horizontal axis and planned aggregate expenditure on the vertical axis. Then draw the 45 Degree Line so both variables have equal values, and add the planned expenditure curve. The intersection marks equilibrium output. Comparing the two curves at other points reveals where spending plans differ from production.
Fiscal policy can be studied by examining how a change in government-related spending affects the planned aggregate expenditure curve and its intersection with the 45 Degree Line. A shifted intersection indicates a different equilibrium level of real output. The framework therefore connects fiscal policy decisions with short-run economic activity and multiplier effects.
The Keynesian cross shows the level of national income consistent with planned aggregate expenditure and real output. It also indicates whether current spending plans align with production or create pressure for adjustment. Because the framework focuses on short-run economic activity, it helps organize analysis of household, firm, and government spending in the economy.