Q.“In a hypothetical economy, planned savings fall short of planned investments, leading to fall in employment and income.” Do you agree with the given statement ? Support your answer with a valid explanation.

I disagree with the given statement.

The key idea here is the Keynesian theory of income determination, specifically the adjustment mechanism when planned savings and planned investments are not equal.

When planned savings fall short of planned investments ($S_p < I_p$), it means that the injections into the circular flow (investments) are greater than the leakages (savings). This implies that aggregate demand exceeds aggregate supply. Producers will respond to this excess demand by increasing production. To increase output, firms will hire more labour, leading to a rise in employment and, c …

Concept and Intuition

In macroeconomics, particularly within the Keynesian framework, the economy is in equilibrium when planned aggregate expenditure (or aggregate demand) equals aggregate supply. A crucial part of this equilibrium condition is that planned savings ($S_p$) must equal planned investments ($I_p$).

Think of it this way: savings represent a leakage from the circular flow of income (money not spent on consumption), while investments represent an injection into the circular flow (spending by firms on capital goods). For the economy to be stable, these leakages and injections must balance out.

When planned savings fall short of planned investments ($S_p < I_p$), it means that the total amount of money firms plan to invest is greater than the amount households plan to save. This implies that the total demand for goods and services (including investment goods) is greater than the total supply of goods and services that the economy is currently producing. This excess demand acts as a stimulus. Firms will find their inventories depleting faster than expected, prompting them to increase production to meet this higher demand. This increase in production, in turn, requires more labor and other resources, leading to higher employment and income. The economy will then adjust upwards until a new equilibrium is reached where planned savings once again equal planned investments.

Step-by-step Explanation

1. Understanding Planned Savings and Investments:

   • Planned Savings ($S_p$) refer to the amount of income that households intend to save at various income levels. It's the portion of disposable income not spent on consumption.
   • Planned Investments ($I_p$) refer to the amount that firms intend to invest in capital goods (like machinery, buildings) and inventories at various income levels. These are ex-ante (intended) values, not ex-post (actual) values.

2. The Implication of $S_p < I_p$:

   • In a simple two-sector economy (households and firms), aggregate supply ($AS$) is represented by national income ($Y$), which is either consumed ($C$) or saved ($S_p$). So, $AS = Y = C + S_p$.
   • Aggregate demand ($AD$) is the sum of consumption expenditure ($C$) and planned investment expenditure ($I_p$). So, $AD = C + I_p$.
   • If planned savings fall short of planned investments ($S_p < I_p$), then by adding consumption ($C$) to both sides, we get $C + S_p < C + I_p$.
   • This directly implies that Aggregate Supply ($AS$) < Aggregate Demand ($AD$). There is an excess of demand in the economy.

3. Impact on Production and Inventories:

   • When aggregate demand exceeds aggregate supply, firms experience an unexpected depletion of their inventories. They are selling more goods than they are currently producing.
   • This fall in inventories signals to firms that there is unmet demand in the market.

4. Firms' Response: Increase in Production:

   • To replenish their inventories and meet the higher demand, firms will increase their production levels. This is a natural response to positive market signals.

5. Impact on Employment and Income:

   • An increase in production requires firms to hire more workers and utilize more resources. This leads to a rise in employment. …