Correct Option
The correct option is 2 and 3 only.
Explanation
In macroeconomics, income is primarily allocated between consumption and savings. The relationship between income, consumption, and savings is fundamental to understanding aggregate demand. The propensity to consume and save describes how these variables change in response to changes in income levels.
Statement-wise Analysis
- Statement 1 is Incorrect. Savings is defined as the portion of disposable income that is not consumed. It represents the residual income after consumption expenditure. Tax payments are a liability paid to the government and are deducted from personal income to arrive at disposable income; they are not considered savings.
- Statement 2 is Correct. The Marginal Propensity to Save (MPS) is defined as the ratio of the change in savings to the change in income. It measures how much savings increase for every additional unit of income generated ($\text{MPS} = \frac{\Delta S}{\Delta Y}$).
- Statement 3 is Correct. The sum of the Marginal Propensity to Consume (MPC) and the Marginal Propensity to Save (MPS) is always equal to 1 ($\text{MPC} + \text{MPS} = 1$). This is because any additional unit of income must either be consumed or saved. Therefore, if MPC is 1 (meaning the entire additional income is consumed), MPS must be 0.
Key Takeaway
Key Takeaway: Disposable income is divided solely between consumption and savings. Consequently, the Marginal Propensity to Consume (MPC) and the Marginal Propensity to Save (MPS) always sum to unity ($1$).