Q.Discuss the adjustment mechanism in the following situations:

Here are the adjustment mechanisms for the given situations:

1. Aggregate demand is lesser than Aggregate Supply ($AD < AS$) When aggregate demand is less than aggregate supply, it means that the total demand for goods and services in the economy is less than the total supply. This leads to an accumulation of unsold stock with producers, resulting in unplanned inventory accumulation. To clear this excess stock and avoid further losses, producers will reduce their planned output. A reduction in output leads to a fall in the level of employment and national income. This process of reducing output and income continues until aggregate supply falls to match the aggregate demand, restoring equilibrium where $AD = AS$.
2. Ex-Ante Investments are greater than Ex-Ante Savings ($I > S$) …

The economy is in equilibrium when the aggregate demand for goods and services equals the aggregate supply of goods and services. This is the point where there is no tendency for output or income to change. When the economy is not in equilibrium, certain adjustment mechanisms come into play to guide it back towards this stable state. These mechanisms primarily operate through changes in inventory levels, which signal to producers whether they need to increase or decrease their output.

(a) Aggregate demand is lesser than Aggregate Supply ($AD < AS$)

When aggregate demand ($AD$) is less than aggregate supply ($AS$), it means that the total amount of goods and services that households, firms, and the government are willing to purchase at the current price level is less than the total amount of goods and services that producers are supplying.

• Inventory Accumulation: In this situation, producers find that they are unable to sell all the goods they have produced. This leads to an unplanned accumulation of inventories. The stock of unsold goods in warehouses and on shelves increases beyond the desired levels that firms typically maintain.
• Production Cutbacks: The accumulation of unwanted inventories acts as a signal to producers. To avoid further losses from unsold stock and to reduce their inventory levels back to desired amounts, firms will respond by cutting back on their production. They will produce fewer goods and services in the subsequent period.
• Reduced Income and Employment: A reduction in production means that firms will demand fewer factors of production, such as labour and capital. This can lead to layoffs, reduced working hours, or lower wages, which in turn decreases the total income ($Y$) earned by households in the economy.
• Reduced Consumption and Aggregate Demand: Since consumption expenditure ($C$) is a direct function of income ($Y$), a fall in income will lead to a reduction in household consumption. This decrease in consumption further contributes to a fall in aggregate demand.
• Convergence to Equilibrium: This process of falling production, income, and consumption continues until the level of aggregate supply (output) falls sufficiently to match the lower aggregate demand. At this point, $AD = AS$ is restored, inventories are back to their desired levels, and there is no further incentive for firms to change their production plans. The economy reaches a new equilibrium at a lower level of income and output.

(b) Ex-Ante Investments are greater than Ex-Ante Savings ($I > S$)

In a simple two-sector economy (households and firms), the equilibrium condition $AD = AS$ can also be expressed as planned investment ($I$) equaling planned saving ($S$). This is because aggregate demand ($AD$) is the sum of consumption ($C$) and investment ($I$), i.e., $AD = C + I$. Aggregate supply ($AS$) is the total output, which is distributed as income ($Y$). Households either consume or save their income, so $Y = C + S$. Since $AS = Y$, we have $AS = C + S$.

Therefore, $AD = AS \implies C + I = C + S \implies I = S$.

When ex-ante (planned) investments ($I$) are greater than ex-ante (planned) savings ($S$), it implies that the total planned spending in the economy (which includes investment) is greater than the total planned income that households intend to save. This situation is equivalent to $AD > AS$. …