Explain the subsistence theory of wage. OR Write the definition of interest. Describe the elements of gross interest.

Subsistence Theory of Wage

The Subsistence Theory of Wage was developed by David Ricardo, a classical economist. According to this theory, the wage rate is determined by the minimum amount of goods and services required to maintain the labourer and his family at the bare subsistence level.

Key Points of the Theory:

1. Subsistence Level:
   • Wages are fixed at a level that provides only the basic necessities (food, clothing, shelter) to the worker and his family.
   • This ensures that the labourer can survive and reproduce the labour force.

2. Natural Wage:

   • The wage rate is called the "natural wage" because it is based on the natural laws of supply and demand in the labour market.
   • If wages rise above the subsistence level, the population increases, leading to more competition for jobs, which eventually brings wages back to the subsistence level.

3. Population Pressure:

   • If wages are too low, workers may suffer from malnutrition and poor health, reducing their efficiency.
   • If wages are too high, more children are born, increasing the labour supply, which again pushes wages down to the subsistence level.

4. Iron Law of Wages:

   • Ricardo’s theory is sometimes called the "Iron Law of Wages" because it suggests that wages cannot permanently rise above the subsistence level due to population adjustments.

Criticisms of the Theory:

• Ignores Non-Subsistence Needs: Workers may demand more than just subsistence for better living standards.
• Assumes Fixed Population: In reality, population changes are not instantaneous.
• Does Not Account for Savings: Workers may save and improve their standard of living over time.

This theory helps explain why wages in agricultural economies (where most workers were subsistence farmers) remained low and stable for long periods.

---

OR

Definition of Interest

Interest is the cost of borrowing money or the reward for lending money. It is the price paid for the use of capital over a specific period. Interest is usually expressed as a percentage of the principal amount (the original sum of money borrowed or lent).

Elements of Gross Interest

Gross interest consists of two main components:

1. Principal (P):

   • The original amount of money borrowed or lent.
   • Example: If someone borrows ₹10,000, this is the principal.

2. Interest (I):

   • The extra amount paid for the use of the principal.
   • It can be calculated using the formula: $$I=P\times r\times t$$ where:
     • $I$ = Interest
     • $P$ = Principal amount
     • $r$ = Rate of interest (per period)
     • $t$ = Time period (in years)

Example Calculation:

If a person borrows ₹5,000 at an annual interest rate of 10% for 2 years, the gross interest would be: $$I=5000\times 0.10\times 2=₹1,000$$ Thus, the total repayment (gross amount) would be: $$\text{Total Amount}=\text{Principal}+\text{Interest}=₹5,000+₹1,000=₹6,000$$

Types of Interest:

• Simple Interest: Interest is calculated only on the original principal.
• Compound Interest: Interest is calculated on the principal plus previous interest (reinvested interest).

This theory helps explain why lenders charge interest and why borrowers must pay extra for using someone else’s money.