Free Commerce topic toolkit
Income Determination, MPC, MPS & Multiplier Toolkit for Class 12 Economics
Income Determination questions connect several formulas: consumption, saving, MPC, MPS, multiplier and equilibrium income. This cluster keeps those relationships together so students can understand the sequence instead of memorising isolated formulas.
Topics covered
- MPC and MPS
- APC and APS
- Consumption function
- Saving function
- Investment multiplier
- Equilibrium income
- Change in income due to change in investment
Calculators in this toolkit
- MPC and MPS Calculator for Class 12 Economics — MPC = ΔC ÷ ΔY; MPS = 1 − MPC
- APC and APS Calculator for Class 12 Economics — APC = C ÷ Y; APS = S ÷ Y = 1 − APC
- Consumption Function Calculator for Class 12 Economics — C = C̄ + MPC × Y; S = Y − C
- Saving Function Calculator for Class 12 Economics — S = −C̄ + MPS × Y; C = Y − S
- Investment Multiplier Calculator for Class 12 Economics — k = 1 ÷ (1 − MPC) = 1 ÷ MPS
- Equilibrium Income Calculator — Two-Sector Economy — Y = (C̄ + I) ÷ (1 − MPC)
- Change in Income from Investment Multiplier Calculator — k = 1 ÷ (1 − MPC); ΔY = k × ΔI
Frequently asked questions
What is the relation between MPC and MPS?
In the simple consumption-saving model, MPC + MPS = 1. If one is known, the other can be calculated immediately.
How is the investment multiplier calculated?
The simple multiplier is k = 1/(1 − MPC), which is also equal to 1/MPS.
How do I calculate equilibrium income?
In a simple two-sector model with C = C̄ + MPC×Y and autonomous investment I, equilibrium income is Y = (C̄ + I)/(1 − MPC).
Free CBSE notes · Practice tests · Free paper analysis / demo